QCAA Philosophy & Reason study materials
QCAA Philosophy & Reason study resources

QCAA Philosophy & Reason key terms

QCAA Philosophy & Reason · Get comfortable with the vocabulary.

Argument

A set of statements in which one or more premises are offered as support for a conclusion, aiming to show that the conclusion is reasonable to accept.

Related: Premise, Conclusion, Inference
Premise

A statement in an argument offered as a reason for accepting the conclusion; premises are the supporting evidence or grounds the arguer provides.

Related: Argument, Conclusion
Conclusion

The statement an argument is trying to establish, which the premises are intended to support or make probable.

Related: Argument, Premise, Inference
Inference

The mental move from premises to a conclusion; the reasoning step by which accepted statements are taken to justify accepting another statement.

Related: Argument, Validity, Inductive strength
Validity

A property of deductive arguments where, if the premises were all true, the conclusion could not possibly be false; validity concerns form, not actual truth.

Related: Soundness, Deduction, Logical form
Soundness

A property of deductive arguments that are both valid in form and have all premises actually true, so the conclusion must be true.

Related: Validity, Deduction
Inductive strength

A property of arguments where true premises make the conclusion highly probable without guaranteeing it; strength comes in degrees.

Related: Induction, Validity, Abduction
Deduction

Reasoning in which the conclusion is claimed to follow necessarily from the premises, so accepting the premises commits you to the conclusion.

Related: Validity, Soundness, Induction
Induction

Reasoning that generalises from observed cases to wider claims or predicts future cases, producing conclusions that are probable rather than certain.

Related: Inductive strength, Deduction, Problem of induction
Abduction

Reasoning to the best explanation, where competing hypotheses are compared and the one that best accounts for the evidence is accepted.

Related: Induction, Hypothesis, Inference
Logical form

The structure of an argument abstracted from its content, shown by replacing specific terms with placeholders to reveal whether the pattern is valid.

Related: Validity, Counterexample
Counterexample

A case in which the premises of an argument are true but the conclusion is false, used to demonstrate that the argument's form is invalid.

Related: Validity, Logical form
Fallacy

A common pattern of reasoning that appears persuasive but fails to provide genuine support for its conclusion because of a structural or rhetorical flaw.

Related: Straw man, False dilemma, Begging the question
Straw man

A fallacy in which an opponent's position is distorted or exaggerated into a weaker version that is then refuted in place of the real view.

Related: Fallacy, Ad hominem
Ad hominem

A fallacy that attacks the person making an argument rather than addressing the reasons and evidence they present.

Related: Fallacy, Straw man
False dilemma

A fallacy that presents only two options as available when other alternatives exist, forcing a choice between artificially limited possibilities.

Related: Fallacy, Begging the question
Begging the question

A fallacy in which the conclusion is assumed in the premises, so the argument presupposes what it is supposed to prove.

Related: Fallacy, Circular reasoning
Circular reasoning

Reasoning in which a claim is supported by another claim that ultimately depends on the first, producing no independent justification.

Related: Begging the question, Fallacy
Necessary condition

A condition that must be present for something to occur, so its absence guarantees the outcome will not happen, though its presence may not be enough.

Related: Sufficient condition, Validity
Sufficient condition

A condition whose presence guarantees that something occurs, though the outcome might still happen through other means if it is absent.

Related: Necessary condition, Deduction
Conceptual analysis

The philosophical method of clarifying a concept by specifying the conditions under which it correctly applies, often tested against imagined cases.

Related: Thought experiment, Necessary condition, Intuition
Thought experiment

An imagined scenario constructed to test a philosophical claim or concept by isolating relevant features and setting aside practical complications.

Related: Conceptual analysis, Intuition, Counterexample
Intuition

A considered pre-theoretical judgement about whether a case falls under a concept, used as evidence that a philosophical theory must accommodate.

Related: Thought experiment, Reflective equilibrium
Reflective equilibrium

A method of adjusting particular judgements and general principles until they cohere, revising whichever seems less credible when they conflict.

Related: Intuition, Conceptual analysis
Scepticism

The view that knowledge or justified belief about some domain is impossible or far harder to attain than commonly assumed.

Related: Justification, Epistemic closure
Justification

The reason or evidence that makes a belief reasonable to hold; a central condition alongside truth and belief in analyses of knowledge.

Related: Knowledge, Scepticism, Reliabilism
Knowledge

Traditionally analysed as justified true belief, though cases of accidentally justified true belief raise doubts about whether these conditions suffice.

Related: Justification, Gettier problem
Gettier problem

A class of cases where a person has a justified true belief that nonetheless seems not to count as knowledge, challenging the traditional analysis.

Related: Knowledge, Justification
Epistemic closure

The principle that if you know something, and know that it entails another proposition, you can also know that further proposition.

Related: Scepticism, Knowledge
Reliabilism

The view that a belief is justified when it is produced by a cognitive process that reliably generates true beliefs.

Related: Justification, Knowledge
Materialism

The metaphysical view that reality consists fundamentally of physical matter or processes, with mental phenomena either identical to or dependent on them.

Related: Dualism, Qualia
Dualism

The view that mind and body are distinct kinds of substance or property, so mental states cannot be fully reduced to physical states.

Related: Materialism, Qualia
Qualia

The subjective, felt qualities of conscious experience, such as the redness of red or the sting of pain, accessible only from the first-person perspective.

Related: Thought experiment, Materialism
Personal identity

The question of what makes a person the same individual over time, despite physical and psychological changes.

Related: Thought experiment, Conceptual analysis
Free will

The capacity of agents to choose and act on their own reasons, contested by those who hold that prior causes determine all events.

Related: Determinism, Compatibilism
Determinism

The thesis that every event, including human choices, is caused by prior conditions such that it could not have occurred otherwise.

Related: Free will, Compatibilism
Compatibilism

The position that free will and determinism are compatible, reinterpreting freedom as acting according to one's own desires without external constraint.

Related: Free will, Determinism
Metaethics

The branch of ethics examining the nature and status of moral claims, including whether they can be true and what makes them true.

Related: Moral realism, Moral relativism
Moral realism

The view that there are moral facts that hold independently of what anyone believes or feels about them.

Related: Metaethics, Moral relativism
Moral relativism

The view that the truth of moral judgements depends on the standards of a particular culture or individual rather than on universal facts.

Related: Metaethics, Moral realism