7.2 Method of Reasoning Questions
Key Takeaways
- Method of Reasoning questions assess abstract pattern recognition by asking how an argument establishes its conclusion rather than whether the argument's conclusion is true.
- Pre-phrasing an abstract structural outline before inspecting answer choices prevents candidates from getting misled by plausible-sounding but structurally inaccurate descriptions.
- Common LSAT argumentation methods include reasoning by analogy, counterexample refutation, reductio ad absurdum, eliminating alternative explanations, and applying a general rule to a specific case.
- Answers to Method of Reasoning questions must pass the 'Fact Test' of structure: every single action described in the correct choice must actually occur within the stimulus.
- Argumentative techniques involving two speakers (Dialogue Method of Reasoning) require tracking precisely how the second speaker responds to the first speaker's premise, assumption, or conclusion.
Understanding Abstract Method of Reasoning Questions
Method of Reasoning questions test your ability to recognize how an argument is constructed. Unlike Assumption, Strengthen, or Weaken questions, Method of Reasoning questions are completely descriptive. You are not tasked with identifying logical errors, evaluating factual validity, or introducing outside information. Instead, you must analyze the stimulus and select an answer choice that accurately describes the logical blueprint the author used to reach their conclusion.
Question Stem Variants
Method of Reasoning stems always direct your focus toward the argument's technique, pattern, or strategy:
- "The argument proceeds by..."
- "Which one of the following is a technique of reasoning employed by the argument?"
- "Which one of the following most accurately describes the method of reasoning used by the politician?"
- "In responding to the initial claim, the advocate uses which one of the following argumentative strategies?"
The Spectrum of LSAT Argumentative Techniques
To master Method of Reasoning questions, you must become fluent in the core structural patterns that appear repeatedly across LSAT administrations. Recognizing these patterns allows you to pre-phrase abstract descriptions quickly.
1. Reasoning by Analogy
Drawing a comparison between two distinct domains that share underlying structural similarities. The author argues that because Property X holds true in the familiar source domain, it must also hold true in the target domain. Abstract Description: "It infers that a policy will be effective in one context by appealing to its success in a relevantly similar context."
2. Refutation by Counterexample
Disproving a broad generalization or universal rule by producing a single verifiable instance where the rule fails to hold. Abstract Description: "It demonstrates that a general principle is overbroad by citing a specific counterinstance."
3. Reductio ad Absurdum (Proof by Contradiction)
Demonstrating that an opponent's claim or hypothesis is false by assuming it to be true for the sake of argument and showing that it logically leads to an impossible, absurd, or self-contradictory result. Abstract Description: "It refutes a position by showing that accepting its premises leads to a logically unsustainable conclusion."
4. Elimination of Alternatives (Disjunctive Syllogism)
Establishing that a phenomenon must be caused by one of a limited set of exhaustive options, systematically disproving all but one candidate option, and concluding that the remaining option must be the true cause. Abstract Description: "It establishes a hypothesis by demonstrating the inadequacy of all competing explanations."
5. Challenging an Underlying Assumption
Attacking an unstated premise required by an opponent's argument rather than attacking their stated factual evidence directly. Abstract Description: "It calls into question a presupposition upon which the opponent's argument depends."
6. Alternative Explanation / Reinterpreting Evidence
Accepting the opponent's factual evidence as correct, but demonstrating that a completely different causal mechanism accounts for the observed data equally well or better. Abstract Description: "It grants the truth of the reported findings while offering an alternative explanation for those findings."
| Argumentative Method | Abstract Definition | Concrete LSAT Example |
|---|---|---|
| Reasoning by Analogy | Comparing two distinct domains to infer shared properties. | Comparing corporate management to a ship's captain to argue for centralized executive authority. |
| Counterexample Refutation | Citing a single instance where a broad rule fails. | Disproving 'all birds fly' by citing the existence of penguins. |
| Reductio ad Absurdum | Showing a premise leads to an impossible contradiction. | Showing that if tax cuts paid for themselves, a 0% tax rate would produce infinite revenue. |
| Elimination of Alternatives | Systematically ruling out competing explanations. | Showing a fire was not electrical or accidental, concluding it must be arson. |
| Challenging Presuppositions | Exposing an unstated premise upon which an argument relies. | Showing an economic forecast relies on the false assumption of zero inflation. |
| Alternative Explanation | Offering a different cause for undisputed facts. | Agreeing sales rose after an ad campaign, but showing a competitor's bankruptcy caused the rise. |
Two-Speaker Dialogue Method Questions
A significant subset of Method of Reasoning questions features a dialogue between two speakers (e.g., Speaker A and Speaker B). The question stem typically asks how Speaker B responds to Speaker A.
Five Common Two-Speaker Response Patterns
- Refuting an Implicit Assumption: Speaker B accepts Speaker A's premises but exposes an unstated, flawed assumption required to draw Speaker A's conclusion.
- Reinterpreting Evidence: Speaker B shows that the very evidence cited by Speaker A actually supports the exact opposite conclusion.
- Exposing Equivocation / Ambiguity: Speaker B demonstrates that Speaker A used a key term in two different senses throughout the argument.
- Counter-argument via Unintended Consequence: Speaker B shows that adopting Speaker A's proposed policy would cause undesirable side-effects that outweigh any anticipated benefits.
- Undermining Premise Credibility: Speaker B provides new empirical evidence that directly contradicts one of Speaker A's explicit factual premises.
The "Fact Test" for Method Answer Choices
The most powerful elimination tool for Method of Reasoning questions is the Fact Test of Structure. Because correct answer choices use highly abstract language, test takers often get confused by formal vocabulary.
To apply the Fact Test:
- Break down the answer choice into every individual structural element (verbs, nouns, and structural relations).
- Search the stimulus for a concrete match for every single element.
- If an answer choice describes an action that did not occur in the stimulus, eliminate it immediately!
Example Fact Test Application
Suppose an answer choice states: "The author refutes a general claim by presenting statistical evidence that demonstrates a causal connection."
To be correct, the stimulus MUST contain:
- A general claim being refuted → Is there a broad generalization present?
- Statistical evidence → Are there percentages, numerical surveys, or statistical data?
- A causal connection → Does the argument establish cause and effect?
If the stimulus presents a single historical anecdote instead of statistical evidence, the choice fails the Fact Test and must be rejected immediately.
Step-by-Step Tactical Blueprint for Method Questions
- Identify the Main Conclusion and Premises: Bracket the argument's structural components.
- Formulate a 1-Sentence Plain-English Summary: Describe what the author did in plain language (e.g., "The author proved the mayor's budget plan will fail by showing it relies on an unrealistic revenue forecast").
- Translate to Abstract Terms: Convert your summary into structural vocabulary (e.g., "The author rejects a proposal by undermining an assumption about future revenues").
- Apply the Fact Test to Eliminate Distractors: Verify that every abstract verb and noun in the remaining choices corresponds to explicit stimulus features.
Read the following argument: 'Some historians argue that the introduction of printing in 15th-century Europe immediately democratized literacy. However, if literacy had truly democratized immediately, we would observe a sharp decline in book prices alongside a dramatic rise in vernacular lay signatures within five years of the press's invention. Historical parish registers show that lay signature rates remained flat for over sixty years following Gutenberg's press. Thus, the immediate democratization hypothesis cannot be correct.' Which one of the following best describes the method of reasoning employed in the argument?
Read the following dialogue: Dr. Aris: 'Implementing a mandatory cap-and-trade system for carbon emissions will severely stifle economic growth, as compliance costs will force manufacturing firms to reduce output.' Dr. Bela: 'On the contrary, mandatory carbon caps drive innovation in green technology. The clean energy sector expands faster than heavy manufacturing contracts, creating a net increase in total employment and industrial output.' Dr. Bela responds to Dr. Aris's argument by:
Read the following argument: 'To determine why the ancient city of Oakhaven was abandoned, archaeologists evaluated three hypotheses: enemy siege, catastrophic drought, or soil exhaustion from over-farming. Recent soil core samples reveal no drop in regional rainfall during the period, eliminating drought. Furthermore, extensive excavations showed zero weapon damage or burned structures, ruling out a siege. Consequently, Oakhaven must have been abandoned due to soil exhaustion.' The argument achieves its conclusion by:
Read the following argument: 'Promoters of a new wellness supplement claim that taking their pill daily guarantees immunity from viral infections. But consider what this claim implies: if the pill truly guaranteed viral immunity, then an individual taking the pill could be exposed to concentrated viral doses indefinitely without producing a single antibody response or symptom. Biological systems simply do not function with absolute invulnerability. Therefore, the promoters' claim is false.' Which one of the following most accurately describes the technique of reasoning used in the argument?