MS PT Juris cheat sheet

IRAC sequence: Issue (frame the legal question), Rule (authority), Application (facts to rule), Conclusion (result). Analysis carries the most weight in scoring.

Deductive validity: if the major premise (rule) and minor premise (facts) are true, the conclusion follows necessarily; a valid argument can still be unsound if a premise is false.

Reasoning by analogy requires identifying the material facts of the precedent, comparing them to the instant facts, and explaining why any differences are or are not legally significant.

Distinguish holding from dictum: only the court's resolution of the issue necessary to the judgment binds; incidental statements are persuasive at most.

Counterargument structure: state the strongest opposing rule application, then distinguish or rebut it with authority rather than ignoring it.

Precedent hierarchy in common-law systems: binding authority (higher court in same jurisdiction, same or superior level) versus persuasive authority (sister jurisdictions, lower courts, secondary sources).

Plain-meaning canon: interpret text according to ordinary meaning at the time of enactment unless the term is a term of art.

Expressio unius est exclusio alterius: listing one thing implies exclusion of others; noscitur a sociis: ambiguous terms take color from associated words.

Judicial review: courts may invalidate legislative or executive acts inconsistent with the constitution; the constitution is supreme over ordinary legislation.

Standing requires injury in fact, causation, and redressability; ripeness concerns premature review; mootness concerns a live controversy that has ended.

State action doctrine: most constitutional rights (e.g., due process, equal protection) constrain government, not purely private conduct.

Strict scrutiny: law must serve a compelling interest and be narrowly tailored (least restrictive means); applies to fundamental rights and suspect classifications such as race.

Intermediate scrutiny: important interest and substantial relationship; applies to sex-based classifications and certain content-neutral regulations.

Rational basis: law is upheld if rationally related to a legitimate interest; burden is on the challenger.

Procedural due process balancing (Mathews v. Eldridge): private interest, risk of erroneous deprivation and value of safeguards, and government's fiscal and administrative burden.

Vagueness and overbreadth doctrines: a law is void if it fails to give fair notice or sweeps in protected conduct; overbreadth permits facial challenges in First Amendment contexts.

Formation requires offer, acceptance, consideration, and mutual assent; consideration is a bargained-for exchange, not a past benefit.

Mirror image rule at common law: acceptance must match the offer; under UCC 2-207, additional or different terms in a definite expression may still form a contract between merchants.

Statute of Frauds categories typically include marriage, year-or-more performance, land, executor's promise, goods of $500 or more (UCC), and surety promises.

Parol evidence rule bars prior or contemporaneous oral agreements that contradict an integrated writing; it does not bar evidence of ambiguity, fraud, or a separate collateral agreement.

Material breach excuses the non-breaching party's remaining performance; minor breach permits damages but not suspension.

Expectation damages place the plaintiff in the position of performance; reliance and restitution are alternatives where expectation is unavailable or speculative.

Mitigation duty: a non-breaching party cannot recover damages for losses that reasonable efforts would have avoided.

Impracticability and frustration: performance excused where an unforeseen event makes performance impracticable without fault, or destroys the principal purpose of the contract.

Elements of a crime: actus reus (voluntary act or omission with legal duty), mens rea, causation, and concurrence of act and mental state.

Mens rea levels under the Model Penal Code: purposely, knowingly, recklessly, negligently; the mental state applies to each material element as specified.

Fourth Amendment: searches require a warrant supported by probable cause unless an exception applies (consent, search incident to arrest, plain view, exigency, automobile, inventory).

Exclusionary rule bars evidence obtained in violation of the Fourth Amendment; exceptions include inevitable discovery, independent source, and attenuation.

Miranda warnings (custody plus interrogation) are required before custodial interrogation; spontaneous statements and booking questions are not covered.

Sixth Amendment right to counsel attaches at formal initiation of adversarial proceedings; it is offense-specific.

Burden of proof: the prosecution must prove every element beyond a reasonable doubt; affirmative defenses may place a burden of production or persuasion on the defendant depending on jurisdiction.

Self-defense requires reasonable belief in imminent unlawful force and proportionality; imperfect self-defense mitigates but does not excuse.

Negligence elements: duty, breach, actual cause, proximate cause, and damages; duty generally runs to foreseeable plaintiffs within the zone of danger.

Res ipsa loquitur permits an inference of negligence where the injury would not ordinarily occur without negligence, the instrumentality was under defendant's control, and plaintiff did not contribute.

Comparative negligence reduces recovery in proportion to plaintiff's fault; contributory negligence is a complete bar in the few jurisdictions retaining it.

Strict liability for abnormally dangerous activities and for defective products; product liability theories include manufacturing defect, design defect, and failure to warn.

Defamation requires a false statement of fact, publication, fault, and harm; public figures must prove actual malice (knowledge of falsity or reckless disregard).

Intentional torts: battery (harmful or offensive contact), assault (apprehension of imminent contact), false imprisonment, trespass, conversion; intent requires purpose or substantial certainty.

Proximate cause limits liability to harms within the risk created by the breach; intervening causes supersede only if unforeseeable.

Damages: compensatory (economic and noneconomic), punitive where conduct is willful or malicious, and nominal where no actual harm is shown.

Estates in land: fee simple absolute (largest estate), fee tail, life estate, and leasehold estates; future interests include reversion, remainder, and executory interest.

Rule Against Perpetuities: no interest is good unless it must vest, if at all, no later than 21 years after a life in being at creation.

Adverse possession elements: actual, open and notorious, exclusive, continuous, and hostile possession for the statutory period.

Recording acts: race (first to record), notice (first bona fide purchaser without notice), and race-notice (first to record without notice); notice may be actual, inquiry, or record.

Co-tenancy: joint tenancy requires the four unities (time, title, interest, possession) and carries right of survivorship; tenancy in common has no survivorship.

Landlord-tenant: covenant of quiet enjoyment, implied warranty of habitability, and constructive eviction where conditions render premises uninhabitable.

Easements may be express, implied, by necessity, or by prescription; they run with the land if appurtenant and properly recorded.

Takings: government regulation that goes too far (denies all economically beneficial use) is a compensable taking; exactions require rough proportionality to the impact.

Relevance requires probative value and materiality; relevant evidence may be excluded if probative value is substantially outweighed by unfair prejudice, confusion, or waste of time.

Hearsay is an out-of-court statement offered to prove the truth of the matter asserted; non-hearsay uses include impeachment and effect on the listener.

Firm hearsay exceptions include present sense impression, excited utterance, statements for medical diagnosis, recorded recollection, and business records.

Confrontation Clause bars testimonial hearsay from unavailable declarants unless the defendant had a prior opportunity to cross-examine.

Character evidence is generally inadmissible to prove conduct; exceptions include the accused's character trait offered by the accused, and character in issue (defamation, negligent entrustment).

Impeachment methods: prior inconsistent statements, bias, conviction of a crime involving dishonesty, and contradiction; specific acts may be inquired into on cross only if probative of truthfulness.

Privileges: attorney-client, spousal, clergy, and physician-patient; the attorney-client privilege survives the client's death and is waived by disclosure to third parties.

Best evidence rule requires the original writing, recording, or photograph to prove its content unless an exception (secondary evidence, lost document, opponent's possession) applies.

Personal jurisdiction requires minimum contacts, fair play, and substantial justice; general jurisdiction requires continuous and systematic affiliation akin to domicile.

Subject-matter jurisdiction: federal question (arising under federal law) or diversity (complete diversity plus amount in controversy exceeding $75,000).

Venue is proper where a defendant resides, where events occurred, or where property is located; forum non conveniens permits dismissal to a more appropriate forum.

Pleading under notice pleading requires a short and plain statement of the claim showing entitlement to relief; heightened particularity applies to fraud and mistake.

Summary judgment is granted when no genuine dispute of material fact exists and the movant is entitled to judgment as a matter of law.

Preclusion: claim preclusion bars relitigation of the same claim; issue preclusion bars relitigation of an issue actually litigated and necessary to the judgment.

Discovery scope is any nonprivileged matter relevant to a claim or defense and proportional to the needs of the case; work product is conditionally protected.

Class certification requires numerosity, commonality, typicality, adequacy of representation, and (for damages classes) predominance and superiority.

Primary authority: constitutions, statutes, regulations, and case law; secondary authority (treatises, restatements, law review articles) is persuasive, not binding.

Research sequence: issue framing, secondary sources for background, statutory and regulatory text, then case law via citators to verify subsequent history.

Citator use: confirm that a case or statute remains good law, check negative treatment signals, and note the depth of the citing discussion.

Legal writing structure: a question presented, a brief answer, a statement of facts, an analysis organized by issue, and a conclusion; use headings that state the rule application.

Accuracy in citation includes correct reporter, court, year, and pinpoint page; quotations must be verbatim with alterations bracketed and omissions marked by ellipsis.

Model Rules of Professional Conduct: competence, diligence, confidentiality, conflicts of interest, and candor to the tribunal.

Confidentiality (Rule 1.6) is broader than attorney-client privilege; disclosure is permitted to prevent reasonably certain death or substantial bodily harm, or to prevent a client's fraud on the tribunal.

Conflict screening: a lawyer may not represent a client whose interests are directly adverse to another client without informed consent; former-client conflicts require the matters be substantially related.

Jurisprudential schools: natural law (law derives from moral order), legal positivism (law is social fact), legal realism (law as predicted judicial behavior), and critical theories.

Textualism interprets statutes by ordinary public meaning; purposivism consults legislative purpose; living constitutionalism treats meaning as evolving with social context.

Stare decisis is a default rule of stability, but courts may overrule precedent where intervening doctrinal change or reliance interests are weighed.

Digital-privacy developments: courts increasingly address geofence warrants, cell-site location data, and third-party doctrine limits under the Fourth Amendment.

Artificial intelligence in law raises questions of professional competence (Rule 1.1), supervision of nonlawyer assistance, and candor regarding AI-generated citations.

Algorithmic decision-making and administrative deference: the trend is toward reduced deference to agency statutory interpretation, with courts exercising independent judgment.

Climate and environmental litigation increasingly invokes constitutional rights, public trust doctrine, and statutory greenhouse-gas regulation.

Comparative and international sources are persuasive, not binding, unless incorporated by treaty or statute; customary international law binds only where recognized domestically.

IRAC sequence: Issue (frame the legal question), Rule (authority), Application (facts to rule), Conclusion (result). Analysis carries the most weight in scoring.

Deductive validity: if the major premise (rule) and minor premise (facts) are true, the conclusion follows necessarily; a valid argument can still be unsound if a premise is false.

Reasoning by analogy requires identifying the material facts of the precedent, comparing them to the instant facts, and explaining why any differences are or are not legally significant.

Distinguish holding from dictum: only the court's resolution of the issue necessary to the judgment binds; incidental statements are persuasive at most.

Counterargument structure: state the strongest opposing rule application, then distinguish or rebut it with authority rather than ignoring it.

Precedent hierarchy in common-law systems: binding authority (higher court in same jurisdiction, same or superior level) versus persuasive authority (sister jurisdictions, lower courts, secondary sources).

Plain-meaning canon: interpret text according to ordinary meaning at the time of enactment unless the term is a term of art.

Expressio unius est exclusio alterius: listing one thing implies exclusion of others; noscitur a sociis: ambiguous terms take color from associated words.

Judicial review: courts may invalidate legislative or executive acts inconsistent with the constitution; the constitution is supreme over ordinary legislation.

Standing requires injury in fact, causation, and redressability; ripeness concerns premature review; mootness concerns a live controversy that has ended.

State action doctrine: most constitutional rights (e.g., due process, equal protection) constrain government, not purely private conduct.

Strict scrutiny: law must serve a compelling interest and be narrowly tailored (least restrictive means); applies to fundamental rights and suspect classifications such as race.

Intermediate scrutiny: important interest and substantial relationship; applies to sex-based classifications and certain content-neutral regulations.

Rational basis: law is upheld if rationally related to a legitimate interest; burden is on the challenger.

Procedural due process balancing (Mathews v. Eldridge): private interest, risk of erroneous deprivation and value of safeguards, and government's fiscal and administrative burden.

Vagueness and overbreadth doctrines: a law is void if it fails to give fair notice or sweeps in protected conduct; overbreadth permits facial challenges in First Amendment contexts.

Formation requires offer, acceptance, consideration, and mutual assent; consideration is a bargained-for exchange, not a past benefit.

Mirror image rule at common law: acceptance must match the offer; under UCC 2-207, additional or different terms in a definite expression may still form a contract between merchants.

Statute of Frauds categories typically include marriage, year-or-more performance, land, executor's promise, goods of $500 or more (UCC), and surety promises.

Parol evidence rule bars prior or contemporaneous oral agreements that contradict an integrated writing; it does not bar evidence of ambiguity, fraud, or a separate collateral agreement.

Material breach excuses the non-breaching party's remaining performance; minor breach permits damages but not suspension.

Expectation damages place the plaintiff in the position of performance; reliance and restitution are alternatives where expectation is unavailable or speculative.

Mitigation duty: a non-breaching party cannot recover damages for losses that reasonable efforts would have avoided.

Impracticability and frustration: performance excused where an unforeseen event makes performance impracticable without fault, or destroys the principal purpose of the contract.

Elements of a crime: actus reus (voluntary act or omission with legal duty), mens rea, causation, and concurrence of act and mental state.

Mens rea levels under the Model Penal Code: purposely, knowingly, recklessly, negligently; the mental state applies to each material element as specified.

Fourth Amendment: searches require a warrant supported by probable cause unless an exception applies (consent, search incident to arrest, plain view, exigency, automobile, inventory).

Exclusionary rule bars evidence obtained in violation of the Fourth Amendment; exceptions include inevitable discovery, independent source, and attenuation.

Miranda warnings (custody plus interrogation) are required before custodial interrogation; spontaneous statements and booking questions are not covered.

Sixth Amendment right to counsel attaches at formal initiation of adversarial proceedings; it is offense-specific.

Burden of proof: the prosecution must prove every element beyond a reasonable doubt; affirmative defenses may place a burden of production or persuasion on the defendant depending on jurisdiction.

Self-defense requires reasonable belief in imminent unlawful force and proportionality; imperfect self-defense mitigates but does not excuse.

Negligence elements: duty, breach, actual cause, proximate cause, and damages; duty generally runs to foreseeable plaintiffs within the zone of danger.

Res ipsa loquitur permits an inference of negligence where the injury would not ordinarily occur without negligence, the instrumentality was under defendant's control, and plaintiff did not contribute.

Comparative negligence reduces recovery in proportion to plaintiff's fault; contributory negligence is a complete bar in the few jurisdictions retaining it.

Strict liability for abnormally dangerous activities and for defective products; product liability theories include manufacturing defect, design defect, and failure to warn.

Defamation requires a false statement of fact, publication, fault, and harm; public figures must prove actual malice (knowledge of falsity or reckless disregard).

Intentional torts: battery (harmful or offensive contact), assault (apprehension of imminent contact), false imprisonment, trespass, conversion; intent requires purpose or substantial certainty.

Proximate cause limits liability to harms within the risk created by the breach; intervening causes supersede only if unforeseeable.

Damages: compensatory (economic and noneconomic), punitive where conduct is willful or malicious, and nominal where no actual harm is shown.

Estates in land: fee simple absolute (largest estate), fee tail, life estate, and leasehold estates; future interests include reversion, remainder, and executory interest.

Rule Against Perpetuities: no interest is good unless it must vest, if at all, no later than 21 years after a life in being at creation.

Adverse possession elements: actual, open and notorious, exclusive, continuous, and hostile possession for the statutory period.

Recording acts: race (first to record), notice (first bona fide purchaser without notice), and race-notice (first to record without notice); notice may be actual, inquiry, or record.

Co-tenancy: joint tenancy requires the four unities (time, title, interest, possession) and carries right of survivorship; tenancy in common has no survivorship.

Landlord-tenant: covenant of quiet enjoyment, implied warranty of habitability, and constructive eviction where conditions render premises uninhabitable.

Easements may be express, implied, by necessity, or by prescription; they run with the land if appurtenant and properly recorded.

Takings: government regulation that goes too far (denies all economically beneficial use) is a compensable taking; exactions require rough proportionality to the impact.

Relevance requires probative value and materiality; relevant evidence may be excluded if probative value is substantially outweighed by unfair prejudice, confusion, or waste of time.

Hearsay is an out-of-court statement offered to prove the truth of the matter asserted; non-hearsay uses include impeachment and effect on the listener.

Firm hearsay exceptions include present sense impression, excited utterance, statements for medical diagnosis, recorded recollection, and business records.

Confrontation Clause bars testimonial hearsay from unavailable declarants unless the defendant had a prior opportunity to cross-examine.

Character evidence is generally inadmissible to prove conduct; exceptions include the accused's character trait offered by the accused, and character in issue (defamation, negligent entrustment).

Impeachment methods: prior inconsistent statements, bias, conviction of a crime involving dishonesty, and contradiction; specific acts may be inquired into on cross only if probative of truthfulness.

Privileges: attorney-client, spousal, clergy, and physician-patient; the attorney-client privilege survives the client's death and is waived by disclosure to third parties.

Best evidence rule requires the original writing, recording, or photograph to prove its content unless an exception (secondary evidence, lost document, opponent's possession) applies.

Personal jurisdiction requires minimum contacts, fair play, and substantial justice; general jurisdiction requires continuous and systematic affiliation akin to domicile.

Subject-matter jurisdiction: federal question (arising under federal law) or diversity (complete diversity plus amount in controversy exceeding $75,000).

Venue is proper where a defendant resides, where events occurred, or where property is located; forum non conveniens permits dismissal to a more appropriate forum.

Pleading under notice pleading requires a short and plain statement of the claim showing entitlement to relief; heightened particularity applies to fraud and mistake.

Summary judgment is granted when no genuine dispute of material fact exists and the movant is entitled to judgment as a matter of law.

Preclusion: claim preclusion bars relitigation of the same claim; issue preclusion bars relitigation of an issue actually litigated and necessary to the judgment.

Discovery scope is any nonprivileged matter relevant to a claim or defense and proportional to the needs of the case; work product is conditionally protected.

Class certification requires numerosity, commonality, typicality, adequacy of representation, and (for damages classes) predominance and superiority.

Primary authority: constitutions, statutes, regulations, and case law; secondary authority (treatises, restatements, law review articles) is persuasive, not binding.

Research sequence: issue framing, secondary sources for background, statutory and regulatory text, then case law via citators to verify subsequent history.

Citator use: confirm that a case or statute remains good law, check negative treatment signals, and note the depth of the citing discussion.

Legal writing structure: a question presented, a brief answer, a statement of facts, an analysis organized by issue, and a conclusion; use headings that state the rule application.

Accuracy in citation includes correct reporter, court, year, and pinpoint page; quotations must be verbatim with alterations bracketed and omissions marked by ellipsis.

Model Rules of Professional Conduct: competence, diligence, confidentiality, conflicts of interest, and candor to the tribunal.

Confidentiality (Rule 1.6) is broader than attorney-client privilege; disclosure is permitted to prevent reasonably certain death or substantial bodily harm, or to prevent a client's fraud on the tribunal.

Conflict screening: a lawyer may not represent a client whose interests are directly adverse to another client without informed consent; former-client conflicts require the matters be substantially related.

Jurisprudential schools: natural law (law derives from moral order), legal positivism (law is social fact), legal realism (law as predicted judicial behavior), and critical theories.

Textualism interprets statutes by ordinary public meaning; purposivism consults legislative purpose; living constitutionalism treats meaning as evolving with social context.

Stare decisis is a default rule of stability, but courts may overrule precedent where intervening doctrinal change or reliance interests are weighed.

Digital-privacy developments: courts increasingly address geofence warrants, cell-site location data, and third-party doctrine limits under the Fourth Amendment.

Artificial intelligence in law raises questions of professional competence (Rule 1.1), supervision of nonlawyer assistance, and candor regarding AI-generated citations.

Algorithmic decision-making and administrative deference: the trend is toward reduced deference to agency statutory interpretation, with courts exercising independent judgment.

Climate and environmental litigation increasingly invokes constitutional rights, public trust doctrine, and statutory greenhouse-gas regulation.

Comparative and international sources are persuasive, not binding, unless incorporated by treaty or statute; customary international law binds only where recognized domestically.

IRAC sequence: Issue (frame the legal question), Rule (authority), Application (facts to rule), Conclusion (result). Analysis carries the most weight in scoring.

Deductive validity: if the major premise (rule) and minor premise (facts) are true, the conclusion follows necessarily; a valid argument can still be unsound if a premise is false.

Reasoning by analogy requires identifying the material facts of the precedent, comparing them to the instant facts, and explaining why any differences are or are not legally significant.

Distinguish holding from dictum: only the court's resolution of the issue necessary to the judgment binds; incidental statements are persuasive at most.

Counterargument structure: state the strongest opposing rule application, then distinguish or rebut it with authority rather than ignoring it.

Precedent hierarchy in common-law systems: binding authority (higher court in same jurisdiction, same or superior level) versus persuasive authority (sister jurisdictions, lower courts, secondary sources).

Plain-meaning canon: interpret text according to ordinary meaning at the time of enactment unless the term is a term of art.

Expressio unius est exclusio alterius: listing one thing implies exclusion of others; noscitur a sociis: ambiguous terms take color from associated words.

Judicial review: courts may invalidate legislative or executive acts inconsistent with the constitution; the constitution is supreme over ordinary legislation.

Standing requires injury in fact, causation, and redressability; ripeness concerns premature review; mootness concerns a live controversy that has ended.

State action doctrine: most constitutional rights (e.g., due process, equal protection) constrain government, not purely private conduct.

Strict scrutiny: law must serve a compelling interest and be narrowly tailored (least restrictive means); applies to fundamental rights and suspect classifications such as race.

Intermediate scrutiny: important interest and substantial relationship; applies to sex-based classifications and certain content-neutral regulations.

Rational basis: law is upheld if rationally related to a legitimate interest; burden is on the challenger.

Procedural due process balancing (Mathews v. Eldridge): private interest, risk of erroneous deprivation and value of safeguards, and government's fiscal and administrative burden.

Vagueness and overbreadth doctrines: a law is void if it fails to give fair notice or sweeps in protected conduct; overbreadth permits facial challenges in First Amendment contexts.

Formation requires offer, acceptance, consideration, and mutual assent; consideration is a bargained-for exchange, not a past benefit.

Mirror image rule at common law: acceptance must match the offer; under UCC 2-207, additional or different terms in a definite expression may still form a contract between merchants.

Statute of Frauds categories typically include marriage, year-or-more performance, land, executor's promise, goods of $500 or more (UCC), and surety promises.

Parol evidence rule bars prior or contemporaneous oral agreements that contradict an integrated writing; it does not bar evidence of ambiguity, fraud, or a separate collateral agreement.

Material breach excuses the non-breaching party's remaining performance; minor breach permits damages but not suspension.

Expectation damages place the plaintiff in the position of performance; reliance and restitution are alternatives where expectation is unavailable or speculative.

Mitigation duty: a non-breaching party cannot recover damages for losses that reasonable efforts would have avoided.

Impracticability and frustration: performance excused where an unforeseen event makes performance impracticable without fault, or destroys the principal purpose of the contract.

Elements of a crime: actus reus (voluntary act or omission with legal duty), mens rea, causation, and concurrence of act and mental state.

Mens rea levels under the Model Penal Code: purposely, knowingly, recklessly, negligently; the mental state applies to each material element as specified.

Fourth Amendment: searches require a warrant supported by probable cause unless an exception applies (consent, search incident to arrest, plain view, exigency, automobile, inventory).

Exclusionary rule bars evidence obtained in violation of the Fourth Amendment; exceptions include inevitable discovery, independent source, and attenuation.

Miranda warnings (custody plus interrogation) are required before custodial interrogation; spontaneous statements and booking questions are not covered.

Sixth Amendment right to counsel attaches at formal initiation of adversarial proceedings; it is offense-specific.

Burden of proof: the prosecution must prove every element beyond a reasonable doubt; affirmative defenses may place a burden of production or persuasion on the defendant depending on jurisdiction.

Self-defense requires reasonable belief in imminent unlawful force and proportionality; imperfect self-defense mitigates but does not excuse.

Negligence elements: duty, breach, actual cause, proximate cause, and damages; duty generally runs to foreseeable plaintiffs within the zone of danger.

Res ipsa loquitur permits an inference of negligence where the injury would not ordinarily occur without negligence, the instrumentality was under defendant's control, and plaintiff did not contribute.

Comparative negligence reduces recovery in proportion to plaintiff's fault; contributory negligence is a complete bar in the few jurisdictions retaining it.

Strict liability for abnormally dangerous activities and for defective products; product liability theories include manufacturing defect, design defect, and failure to warn.

Defamation requires a false statement of fact, publication, fault, and harm; public figures must prove actual malice (knowledge of falsity or reckless disregard).

Intentional torts: battery (harmful or offensive contact), assault (apprehension of imminent contact), false imprisonment, trespass, conversion; intent requires purpose or substantial certainty.

Proximate cause limits liability to harms within the risk created by the breach; intervening causes supersede only if unforeseeable.

Damages: compensatory (economic and noneconomic), punitive where conduct is willful or malicious, and nominal where no actual harm is shown.

Estates in land: fee simple absolute (largest estate), fee tail, life estate, and leasehold estates; future interests include reversion, remainder, and executory interest.

Rule Against Perpetuities: no interest is good unless it must vest, if at all, no later than 21 years after a life in being at creation.

Adverse possession elements: actual, open and notorious, exclusive, continuous, and hostile possession for the statutory period.

Recording acts: race (first to record), notice (first bona fide purchaser without notice), and race-notice (first to record without notice); notice may be actual, inquiry, or record.

Co-tenancy: joint tenancy requires the four unities (time, title, interest, possession) and carries right of survivorship; tenancy in common has no survivorship.

Landlord-tenant: covenant of quiet enjoyment, implied warranty of habitability, and constructive eviction where conditions render premises uninhabitable.

Easements may be express, implied, by necessity, or by prescription; they run with the land if appurtenant and properly recorded.

Takings: government regulation that goes too far (denies all economically beneficial use) is a compensable taking; exactions require rough proportionality to the impact.

Relevance requires probative value and materiality; relevant evidence may be excluded if probative value is substantially outweighed by unfair prejudice, confusion, or waste of time.

Hearsay is an out-of-court statement offered to prove the truth of the matter asserted; non-hearsay uses include impeachment and effect on the listener.

Firm hearsay exceptions include present sense impression, excited utterance, statements for medical diagnosis, recorded recollection, and business records.

Confrontation Clause bars testimonial hearsay from unavailable declarants unless the defendant had a prior opportunity to cross-examine.

Character evidence is generally inadmissible to prove conduct; exceptions include the accused's character trait offered by the accused, and character in issue (defamation, negligent entrustment).

Impeachment methods: prior inconsistent statements, bias, conviction of a crime involving dishonesty, and contradiction; specific acts may be inquired into on cross only if probative of truthfulness.

Privileges: attorney-client, spousal, clergy, and physician-patient; the attorney-client privilege survives the client's death and is waived by disclosure to third parties.

Best evidence rule requires the original writing, recording, or photograph to prove its content unless an exception (secondary evidence, lost document, opponent's possession) applies.

Personal jurisdiction requires minimum contacts, fair play, and substantial justice; general jurisdiction requires continuous and systematic affiliation akin to domicile.

Subject-matter jurisdiction: federal question (arising under federal law) or diversity (complete diversity plus amount in controversy exceeding $75,000).

Venue is proper where a defendant resides, where events occurred, or where property is located; forum non conveniens permits dismissal to a more appropriate forum.

Pleading under notice pleading requires a short and plain statement of the claim showing entitlement to relief; heightened particularity applies to fraud and mistake.

Summary judgment is granted when no genuine dispute of material fact exists and the movant is entitled to judgment as a matter of law.

Preclusion: claim preclusion bars relitigation of the same claim; issue preclusion bars relitigation of an issue actually litigated and necessary to the judgment.

Discovery scope is any nonprivileged matter relevant to a claim or defense and proportional to the needs of the case; work product is conditionally protected.

Class certification requires numerosity, commonality, typicality, adequacy of representation, and (for damages classes) predominance and superiority.

Primary authority: constitutions, statutes, regulations, and case law; secondary authority (treatises, restatements, law review articles) is persuasive, not binding.

Research sequence: issue framing, secondary sources for background, statutory and regulatory text, then case law via citators to verify subsequent history.

Citator use: confirm that a case or statute remains good law, check negative treatment signals, and note the depth of the citing discussion.

Legal writing structure: a question presented, a brief answer, a statement of facts, an analysis organized by issue, and a conclusion; use headings that state the rule application.

Accuracy in citation includes correct reporter, court, year, and pinpoint page; quotations must be verbatim with alterations bracketed and omissions marked by ellipsis.

Model Rules of Professional Conduct: competence, diligence, confidentiality, conflicts of interest, and candor to the tribunal.

Confidentiality (Rule 1.6) is broader than attorney-client privilege; disclosure is permitted to prevent reasonably certain death or substantial bodily harm, or to prevent a client's fraud on the tribunal.

Conflict screening: a lawyer may not represent a client whose interests are directly adverse to another client without informed consent; former-client conflicts require the matters be substantially related.

Jurisprudential schools: natural law (law derives from moral order), legal positivism (law is social fact), legal realism (law as predicted judicial behavior), and critical theories.

Textualism interprets statutes by ordinary public meaning; purposivism consults legislative purpose; living constitutionalism treats meaning as evolving with social context.

Stare decisis is a default rule of stability, but courts may overrule precedent where intervening doctrinal change or reliance interests are weighed.

Digital-privacy developments: courts increasingly address geofence warrants, cell-site location data, and third-party doctrine limits under the Fourth Amendment.

Artificial intelligence in law raises questions of professional competence (Rule 1.1), supervision of nonlawyer assistance, and candor regarding AI-generated citations.

Algorithmic decision-making and administrative deference: the trend is toward reduced deference to agency statutory interpretation, with courts exercising independent judgment.

Climate and environmental litigation increasingly invokes constitutional rights, public trust doctrine, and statutory greenhouse-gas regulation.

Comparative and international sources are persuasive, not binding, unless incorporated by treaty or statute; customary international law binds only where recognized domestically.