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120 cards · .apkg and CSV

LSAT Logical Reasoning Essentials — MintDeck

120 cards covering the reasoning toolkit the LSAT actually tests — every major Logical Reasoning question type, the common flaws (correlation–causation, necessary vs. sufficient, ad hominem, and more), conditional-logic rules with contrapositives and quantifiers, argument structure, and Reading Comprehension strategy. Reflects the current format: the Logic Games (Analytical Reasoning) section was removed in 2024, so Logical Reasoning is now two of the three scored sections. Built to make the fundamentals automatic — not to replace timed practice on official PrepTests.

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1Front
Must Be True (Inference) — what the stem looks like

question-types · mintdeck · lsat

1Back
“If the statements above are true, which one of the following must also be true?” Stay inside the stimulus — the correct answer is fully proven by the given facts. Do not bring in outside assumptions.
2Front
Must Be True — the trap to avoid

question-types · mintdeck · lsat

2Back
Answers that are merely plausible, likely, or 'could be true.' If a fact in the stimulus doesn't lock the answer in, it's wrong. 'Must' means guaranteed, not reasonable.
3Front
Most Strongly Supported

question-types · mintdeck · lsat

3Back
Like Must Be True but looser: the answer only needs to be the best-supported choice, not airtight. Pick the option the stimulus makes most likely, not one it merely permits.
4Front
Main Conclusion (Main Point) — approach

question-types · mintdeck · lsat

4Back
“Which one most accurately expresses the main conclusion?” Find the single claim every other statement is offered to support. Use the 'why' test: the conclusion is what the premises answer 'why?' for.
5Front
Necessary Assumption — what it asks

question-types · mintdeck · lsat

5Back
“The argument depends on / requires assuming which of the following?” The answer is something that must be true for the argument to hold up — not enough to prove the conclusion, just required by it.
6Front
Sufficient Assumption (Justify) — what it asks

question-types · mintdeck · lsat

6Back
“Which one, if assumed, allows the conclusion to be properly drawn?” The answer plugs the gap so completely that the conclusion follows with certainty. It can be stronger than strictly necessary.
7Front
Strengthen — what the right answer does

question-types · mintdeck · lsat

7Back
“Which one, if true, most strengthens the argument?” Add support: affirm the assumption, close the premise–conclusion gap, or rule out an alternative explanation. The answer need not prove the conclusion, only help it.
8Front
Weaken — what the right answer does

question-types · mintdeck · lsat

8Back
“Which one, if true, most undermines / casts the most doubt?” Attack the assumption or supply an alternative explanation. The answer doesn't have to disprove the conclusion, only make it less likely.
9Front
Flaw in the Reasoning

question-types · mintdeck · lsat

9Back
“The argument is vulnerable to criticism on the grounds that it...” Name the logical error in the abstract (e.g., 'takes a necessary condition to be sufficient,' 'mistakes correlation for causation'). Learn the standard flaw descriptions.
10Front
Method of Reasoning (Argument Method)

question-types · mintdeck · lsat

10Back
“The argument proceeds by...” Describe HOW the argument is built, not whether it's good: e.g., 'offers a counterexample,' 'draws an analogy,' 'rules out alternatives.' Match the abstract description to what the author did.
11Front
Role / Function of a Statement (Argument Part)

question-types · mintdeck · lsat

11Back
“The claim that X plays which role in the argument?” Decide whether the referenced sentence is the main conclusion, a premise, a sub-conclusion, or background. Locate the main conclusion first, then place the claim relative to it.
12Front
Parallel Reasoning

question-types · mintdeck · lsat

12Back
“Which argument is most similar in its reasoning?” Match the logical STRUCTURE — conclusion type, conditional pattern, validity — not the topic. Strip out the subject matter and compare the skeletons.
13Front
Parallel Flaw

question-types · mintdeck · lsat

13Back
Match an argument that contains the SAME logical error. First identify the flaw in the stimulus, then find the answer that commits exactly that error — not just any bad argument.
14Front
Principle — Identify vs. Apply

question-types · mintdeck · lsat

14Back
Identify: find the broad rule the specific argument conforms to. Apply: take a stated rule and use it to judge a particular case. Principle questions often behave like Strengthen or Must Be True questions in disguise.
15Front
Resolve the Paradox / Discrepancy

question-types · mintdeck · lsat

15Back
“Which one most helps to resolve the apparent discrepancy?” Find a new fact that lets BOTH surprising statements be true at once. The right answer explains, never contradicts, either side of the puzzle.
16Front
Point at Issue (Disagreement)

question-types · mintdeck · lsat

16Back
“X and Y disagree over whether...” The answer must be a claim that one speaker would affirm and the other deny — both must have an opinion on it. Run the 'agree/disagree test' on each choice.
17Front
Evaluate the Argument

question-types · mintdeck · lsat

17Back
“Which question would be most useful to answer in evaluating the argument?” The right answer is a question whose two possible answers push the argument in opposite directions (the Variance Test).
18Front
Cannot Be True

question-types · mintdeck · lsat

18Back
Find the answer that is impossible given the stimulus — the one that directly conflicts with or is ruled out by the stated facts. It's the mirror image of Must Be True.
19Front
Conform to a Principle / 'Most Closely Conforms'

question-types · mintdeck · lsat

19Back
Treat the stated principle as a rule and find the situation or judgment it best supports. The correct answer is licensed by the principle; wrong answers go beyond or against it.
20Front
Stimulus structure: Stimulus → Question stem → 5 answers

question-types · mintdeck · lsat

20Back
Read the stimulus first, identify conclusion and premises, anticipate the gap, THEN read the stem and prephrase an answer before looking at the choices. Reading the stem first wastes time on facts you must reread anyway.

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Topics covered

6 topics

  • Logical Reasoning Question Types

    Must Be True, assumption, strengthen/weaken, flaw, method, parallel, principle, paradox & more

    24 cards
  • Common Logical Flaws

    Correlation–causation, necessary/sufficient, ad hominem, circular reasoning, straw man, sampling & more

    28 cards
  • Conditional & Formal Logic

    Sufficient vs. necessary, contrapositives, the unless rule, quantifiers, valid vs. invalid inferences

    26 cards
  • Argument Structure

    Premises, conclusions, sub-conclusions, assumptions, indicator words & finding the gap

    16 cards
  • Reading Comprehension

    Main point, author attitude, passage structure, function questions & comparative passages

    12 cards
  • Format & Strategy

    Current section structure, 120–180 scoring, no-guessing-penalty, pacing & blind review

    14 cards

Card format

Front
Concept, question stem, or logic rulee.g. Necessary vs. sufficient assumption
Back
Concise explanation with how it applies on the LSAT

Who it’s for

  • Pre-law students preparing for the LSAT
  • Self-studiers who want to drill question types and flaw patterns with spaced repetition
  • Anyone retaking the LSAT who wants the logic fundamentals to become automatic
  • Students supplementing a prep course (PowerScore, 7Sage, Manhattan, Blueprint) with active recall

Study smarter with MintDeck

MintDeck’s FSRS spaced repetition resurfaces each question type, flaw pattern, and conditional-logic rule right before you’d forget it — so the fundamentals are automatic by the time you sit the LSAT.

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This deck is provided for educational purposes only and is not affiliated with or endorsed by the Law School Admission Council. The LSAT is a skills-based reasoning test — flashcards reinforce question types, flaws, and logic fundamentals but are not a substitute for timed practice with official LSAT PrepTests. LSAT® is a registered trademark of the Law School Admission Council (LSAC), which does not endorse this product.