Evaluating
Arguments

Learn to identify claims, analyze evidence, and assess whether an author's reasoning actually holds up under scrutiny.

ACT Reading

What Is an Argument?

In ACT Reading, an argument is not a quarrel. It is a structured attempt by an author to persuade you that a particular position is true. Every argument has identifiable parts that you can examine and evaluate.

Claim

The main point or conclusion the author wants you to accept.

Evidence

Facts, examples, data, or testimony used to support the claim.

Reasoning

The logical connection explaining why the evidence supports the claim.

The Anatomy of an Argument

Why This Matters on the ACT

The ACT Reading section regularly tests your ability to evaluate arguments in social science, natural science, and humanities passages. These questions ask you to go beyond finding facts: they require you to judge quality.

Strengthen / Weaken

"Which of the following, if true, would most weaken the author's argument?"

Evaluate Evidence

"The author supports the claim primarily by..."

Identify Assumptions

"The author's argument assumes that..."

The Evaluation Framework

Claim vs. Evidence

Many students confuse these two. The claim is the author's opinion or conclusion. The evidence is the factual support. On the ACT, you must distinguish them quickly.

	Claim	Evidence
Nature	Opinion or conclusion	Fact, data, or example
Can be argued	Yes	No (verifiable)
Signal words	"should," "must," "therefore"	"studies show," "according to," "in 2019"
Role	Needs support	Provides support

Types of Evidence

Statistical

Numbers, percentages, and data from studies or surveys.

Anecdotal

Personal stories or individual examples used to illustrate a point.

Expert Testimony

Statements from authorities or specialists in a relevant field.

Analogical

Comparisons to similar situations that the reader already accepts.

How to Evaluate Step by Step

1

Locate the claim. Find the main point the author is arguing. Look for opinion language and conclusion indicators.

2

Identify the evidence. What facts, examples, or data does the author provide? Mark them in the passage.

3

Test for relevance. Does the evidence actually address the specific claim? Or is it about a related but different topic?

4

Check sufficiency. Is there enough evidence to be convincing, or is the author relying on a single example?

5

Spot logical flaws. Look for assumptions, overgeneralizations, or gaps between the evidence and the conclusion.

Worked Example: Basic

1

Claim: "Community gardens improve mental health."

2

Evidence: A 2020 study showing a 35% decrease in anxiety. (Statistical + research-based)

3

Evaluation: Relevant and specific, but limited to one study. A question might ask what would strengthen this: more studies, larger sample sizes, or different populations.

Worked Example: Intermediate

1

Claim: "Electric vehicles are the solution to urban pollution."

2

Evidence: One neighbor's car switch and a subjective impression. (Anecdotal)

3

Evaluation: Weak. One anecdote cannot support a sweeping claim. The evidence is insufficient and relies on personal perception rather than measured data.

Worked Example: Advanced

1

Claim: Bilingual education improves cognitive flexibility.

2

Evidence: Named researcher + meta-analysis of 47 studies across 12 countries with a specific metric (14%).

3

Evaluation: Strong. Multiple sources, large scope, named authority, and quantified results. A weakening question might ask about confounding variables or age limitations.

Spotting Logical Flaws

The ACT does not expect you to name fallacies, but it does expect you to recognize when reasoning breaks down. Here are the most common flaws tested:

Overgeneralization

Drawing a broad conclusion from limited evidence: "One study proved..." becomes "all experts agree..."

False Cause

Assuming that because two things happen together, one caused the other.

Hidden Assumption

An unstated belief that the argument depends on but never proves.

Strengthen vs. Weaken

Common Mistakes

✕ Confusing Tone with Logic

A confident, authoritative tone does not make an argument logically strong. Evaluate the evidence, not the writing style.

✕ Picking Personal Beliefs

Choose the answer supported by the passage, not the one you personally agree with. The ACT tests reading, not opinion.

✕ Ignoring Scope

An answer that is true but irrelevant to the specific claim is wrong. Always check that evidence and claim match in scope.

Summary Reference Table

Question Type	What to Look For	Strategy
Identify the claim	Opinion language, thesis	Find "should," "must," "therefore"
Identify evidence	Facts, data, quotes	Find "according to," specific numbers
Strengthen	Supporting information	Add data that confirms the assumption
Weaken	Contradicting information	Find alternative explanation or counter-data
Assumption	Unstated prerequisite	What must be true for the logic to work?

Question 1 of 5

"Local honey cures seasonal allergies. My co-worker started eating a tablespoon of local honey every morning last spring, and by summer, she said her allergy symptoms were much milder than the previous year."

▼ Tap to read passage

Which of the following best describes the weakness of this argument?

The argument relies on one person's subjective experience with no comparison group, making it anecdotal and insufficient. A single case cannot support a general medical claim.

Question 2 of 5

An author argues that screen time reduces academic performance and cites a study showing students who use phones more than 4 hours daily score 12% lower on standardized tests. Which of the following would most strengthen this argument?

A longitudinal study showing the causal direction (reducing screen time leads to improvement) directly strengthens the claim. The other options are either irrelevant or introduce confounding variables.

Question 3 of 5

"Public transit systems should receive increased federal funding. Cities with robust public transit, such as New York and San Francisco, have lower per-capita carbon emissions than car-dependent cities like Houston. Investing in transit is the most effective way to reduce national carbon output."

▼ Tap to read passage

The author's argument assumes which of the following?

The argument assumes a causal link between transit and low emissions. Without this assumption, the correlation between transit availability and emissions could be explained by other factors like population density or climate.

Question 4 of 5

An author claims that "arts education improves creativity" and supports this by citing three studies from different universities that measured divergent thinking scores. Which term best describes the type of evidence the author uses?

The author cites three studies with measured scores (divergent thinking), making this statistical/research-based evidence from multiple sources, not anecdotal, analogical, or from a single authority.

Question 5 of 5

"Year-round schooling would improve student achievement. Countries that have longer school years, such as Japan and South Korea, consistently outperform the United States on international assessments. Clearly, if American students spent more days in school, their scores would rise as well."

▼ Tap to read passage

Which of the following, if true, would most weaken the author's argument?

This directly attacks the causal assumption. If those countries' success comes from private tutoring rather than longer school years, then extending the American school year would not necessarily produce the same results.

EvaluatingArguments

What Is an Argument?

The Anatomy of an Argument

Why This Matters on the ACT

The Evaluation Framework

Claim vs. Evidence

Types of Evidence

How to Evaluate Step by Step

Worked Example: Basic

Worked Example: Intermediate

Worked Example: Advanced

Spotting Logical Flaws

Strengthen vs. Weaken

Common Mistakes

Summary Reference Table

Question 1 of 5

Question 2 of 5

Question 3 of 5

Question 4 of 5

Question 5 of 5

Evaluating
Arguments