LSAT common mistakes
LSAT · Understand the traps and how to avoid them.
Reading the logical reasoning stimulus first and only then checking the question stem, so the first read is unfocused and often has to be repeated.
Different stems require different reading goals (find the flaw, force the conclusion, resolve a paradox), and reading without that filter lets the mind treat every detail as equally important.
What to do instead
Read the question stem first, classify the task in one phrase, then read the stimulus looking specifically for the conclusion, premises, and the gap the task targets.
In conditional reasoning, treating sufficient and necessary conditions as interchangeable, such as diagramming 'only if' as if it introduced the sufficient condition.
Ordinary language does not mark arrow direction, and words like 'only,' 'unless,' and 'requires' are easy to process in the wrong order.
What to do instead
Translate every conditional statement into a strict 'if X then Y' sentence before diagramming; for necessity, test by asking whether the absence of Y forces the absence of X.
On Strengthen and Weaken questions, selecting a choice because it supports or attacks a premise or background fact rather than the conclusion or the premise-conclusion link.
Premises often sound factual and vivid, while the conclusion may be abstract, so choices that reinforce what is already accepted feel relevant.
What to do instead
Label the conclusion explicitly and state the exact assumption linking it to the premises; evaluate each choice by asking whether it makes that conclusion more or less likely given those premises.
On Sufficient Assumption questions, choosing an answer that is merely plausible or necessary but does not force the conclusion to follow.
Test-takers conflate 'helpful' with 'sufficient,' and answer choices often restate a premise or add a mild fact that leaves the argument's gap open.
What to do instead
Add the candidate answer to the premises and check whether the conclusion follows with certainty; if any unstated gap remains, reject the choice.
On Must Be True and Inference questions, importing outside knowledge or making causal or predictive leaps that the stimulus does not license.
Familiar subject matter triggers real-world assumptions, and correct answers are often modestly worded, which can feel too weak to be the answer.
What to do instead
Treat the stimulus as the only evidence in the world; for each choice ask whether it is directly stated or follows by strict combination of stated facts, and reject any choice requiring an unstated link.
On Flaw questions, naming an abstract flaw from memory without verifying that the described terms match the argument's exact premise-conclusion structure.
Answer choices use technical labels and familiar keywords, encouraging pattern matching instead of structural checking.
What to do instead
Prephrase the gap in plain language first, then for each contender map the answer's described evidence and conclusion back onto the actual argument and reject any mismatch in terms or direction.
Reading a passage only for content and never tracking paragraph function, author viewpoint, or who is speaking, then missing main-point and attitude questions.
Dense text and time pressure push attention toward absorbing facts rather than monitoring the passage's architecture.
What to do instead
After each paragraph, write a three-to-five word function label (e.g., 'critic's objection,' 'author concedes') and mark any shift in viewpoint or tone before moving to the questions.
Answering detail questions from memory instead of returning to the cited line and reading the surrounding sentences.
Memory is reconstructive and blends similar details across a long passage, especially under time pressure.
What to do instead
For every detail or line-reference question, locate the line, read at least one sentence before and after it, and match the answer to the exact text rather than to a general impression.
Choosing an answer that is true according to the passage but does not answer the specific question asked, such as picking a true detail for a main-point question.
A true statement is immediately attractive, and question-task words are easy to blur once answer choices are being evaluated.
What to do instead
Classify the question type before looking at the choices, then apply the matching test: for main point, ask whether the choice covers the whole passage; for attitude, ask whether it is the author's view.
In comparative passages, treating the two passages as one continuous text and ignoring where the authors agree, differ, or respond to each other.
The passages share a topic, so the mind merges their claims and loses track of separate viewpoints.
What to do instead
After reading both, explicitly note each author's central claim and one point of agreement or disagreement; answer relationship questions by checking each author's stance separately.