Method of
Reasoning

Learn to identify how an argument works by describing its logical structure, not what it says.

LSAT Logical Reasoning

What Is Method of Reasoning?

On the LSAT, Method of Reasoning questions ask you to describe how an argument proceeds: its logical structure, techniques, and moves. You are not asked what the argument concludes or whether it is valid: you are asked to identify the argumentative strategy the author uses.

Recognizing the Question Stem

Method of Reasoning questions use distinctive language in the question stem. Learn to spot these keywords instantly so you know what task you face.

Classic Stems

"The argument proceeds by..." or "The argument does which one of the following?"

Variation Stems

"The method of reasoning is best described as..." or "Which technique does the author employ?"

Role Stems

"The claim that X plays which of the following roles in the argument?" (a close cousin)

Why This Skill Matters

Method of Reasoning questions appear on nearly every scored LSAT section. Mastering them also strengthens your ability to handle Flaw, Parallel Reasoning, and Role-of-a-Statement questions: they all require the same structural analysis skill.

Frequency

2 to 4 questions per Logical Reasoning section on average

Transferability

Builds the structural reading skill that powers 40% of LR question types

The Argument Anatomy

Common Argumentative Techniques

1

Analogy: Comparing two situations to argue that what is true of one is true of the other.

2

Counterexample: Citing a specific case that contradicts a general claim.

3

Reductio ad absurdum: Showing that a position leads to an absurd or unacceptable consequence.

4

Principle application: Stating a general rule, then applying it to a specific case.

5

Ruling out alternatives: Eliminating competing explanations to support the remaining one.

Method vs. Flaw

These two question types both ask about argument structure, but they differ in a crucial way. Understanding the distinction prevents choosing a wrong answer type.

	Method of Reasoning	Flaw
Task	Describe how the argument proceeds	Identify what goes wrong in the reasoning
Tone of Correct Answer	Neutral, descriptive	Critical, points out error
Assumes Argument is Valid?	Neither: just describes	No: argument is flawed
Keywords	"proceeds by," "does which"	"vulnerable to criticism," "flaw"

More Techniques to Know

Appeal to Authority

Citing an expert or authoritative source to support a claim

Generalization

Drawing a broad conclusion from specific observations or data

Distinguishing Cases

Showing that two situations that seem similar are actually different in a relevant way

Conditional Reasoning

Using "if...then" logic to derive a conclusion from a conditional premise

The 4-Step Approach

1

Read the stimulus and identify the conclusion. Ask: "What is the author trying to prove?" Bracket it mentally or on paper.

2

Map the premises and their roles. Is the author citing evidence, using an analogy, addressing an objection, or applying a principle?

3

Predict the method in abstract terms before reading the answers. Say to yourself: "The author does X to conclude Y."

4

Match your prediction to the most accurate answer choice. Eliminate choices that misdescribe any part of the structure.

Worked Example 1

Worked Example 2

Worked Example 3 (Harder)

Structural breakdown: The author states a conditional: "If effective, then reduced emissions AND no cost increase." Then the author shows both consequents fail (emissions unchanged, costs up). By denying the consequent, the author concludes the antecedent is false.

Describing in Abstract Terms

Correct Method of Reasoning answers are written in abstract, structural language. They never mention specific people, places, or content. Practice translating concrete arguments into abstract descriptions.

Too Specific

"It argues that the highway will reduce pollution by reducing congestion."

Properly Abstract

"It counters a claim by arguing that the purported negative effect is outweighed by a positive one."

Elimination Strategy

Wrong answers on Method questions tend to fail in predictable ways. Use these filters to eliminate quickly:

1

Wrong conclusion: The choice describes a conclusion the author never actually draws.

2

Wrong technique: The choice names a technique (analogy, generalization) the author never uses.

3

Wrong relationship: The choice reverses which claim supports which, or calls a premise a conclusion.

4

Evaluative language: The choice says the argument is "flawed" or "fails to consider" something: that belongs on a Flaw question.

Common Mistakes

✕ Choosing Content Over Structure

Picking an answer because it mentions something from the stimulus, even though it mislabels the structural role of that element.

✕ Confusing Method with Flaw

Selecting an answer that criticizes the argument's logic. Method questions ask for neutral description, not evaluation.

✕ Missing the Actual Conclusion

Misidentifying a sub-conclusion or premise as the main conclusion, causing every structural description to be off.

Method of Reasoning Summary

Element	What to Do
Question Stem	Look for "proceeds by," "does which," "method"
Conclusion	Identify it first: the entire analysis depends on it
Premises	Map their roles: evidence, analogy, counterexample, etc.
Prediction	Describe the method in abstract terms before reading choices
Elimination	Reject wrong conclusion, wrong technique, evaluative language
Final Check	Does the answer accurately describe every structural move?

Question 1 of 5

Historian: Some scholars claim that the printing press alone caused the Reformation. But the Reformation also required widespread literacy, economic disruption, and political will. The printing press was necessary, but not sufficient. Therefore, it is misleading to credit the printing press as the sole cause.

▼ Tap to read passage

The historian's argument proceeds by:

The historian does not reject the printing press entirely: they accept it as necessary but argue it was not sufficient by citing other required factors. This is acknowledging importance while arguing for additional conditions.

Question 2 of 5

Councilmember: The mayor argues that building a stadium will revitalize downtown. But Cedar Falls built a stadium in 2015 and saw no economic improvement. Lakewood built one in 2018 with the same result. If stadiums reliably produced revitalization, at least one of these cities would have seen gains. Clearly, there is no guarantee a stadium will revitalize our downtown.

▼ Tap to read passage

The councilmember's reasoning does which one of the following?

The councilmember uses two specific examples (Cedar Falls and Lakewood) as evidence against the general claim that stadiums cause revitalization. This is citing counterexamples to challenge a causal generalization.

Question 3 of 5

Nutritionist: People often say that organic food is healthier simply because it is organic. But "organic" is a farming method, not a nutritional category. A candy bar made with organic sugar is still a candy bar. Health depends on the overall nutritional profile, not the farming label.

▼ Tap to read passage

The nutritionist's argument is best described as:

The nutritionist separates the concept of "organic" (a farming method) from "healthy" (a nutritional property), showing they are distinct categories that people mistakenly equate. The candy bar example illustrates the distinction. No statistics or absurd consequences are involved.

Question 4 of 5

Professor: If this artifact were from the Bronze Age, it would contain trace amounts of tin. Lab analysis reveals no tin whatsoever. Moreover, the pottery style matches that of Iron Age settlements in the region. So this artifact is not from the Bronze Age.

▼ Tap to read passage

The professor's argument proceeds by:

The professor sets up a conditional: "If Bronze Age, then tin." Lab analysis shows no tin (consequent is false), so the professor concludes the artifact is not Bronze Age (antecedent is false). This is textbook denying the consequent (modus tollens), with additional corroborating evidence from pottery style.

Question 5 of 5

Critic: Supporters of the proposed tax cut argue that it will stimulate the economy, just as a similar cut did in 1985. But the 1985 economy had high interest rates and low consumer debt, whereas today's economy has low interest rates and high consumer debt. Since the economic conditions are fundamentally different, we cannot assume the same policy will produce the same results.

▼ Tap to read passage

Which one of the following most accurately describes the method of reasoning the critic employs?

The supporters reason by analogy: "It worked in 1985, so it will work now." The critic attacks the analogy by pointing out relevant differences (interest rates, consumer debt) between then and now. This is the classic method of undermining an argument by analogy by distinguishing the cases.

Method ofReasoning

What Is Method of Reasoning?

Recognizing the Question Stem

Why This Skill Matters

The Argument Anatomy

Common Argumentative Techniques

Method vs. Flaw

More Techniques to Know

The 4-Step Approach

Worked Example 1

Worked Example 2

Worked Example 3 (Harder)

Describing in Abstract Terms

Elimination Strategy

Common Mistakes

Method of Reasoning Summary

Question 1 of 5

Question 2 of 5

Question 3 of 5

Question 4 of 5

Question 5 of 5

Method of
Reasoning