Command of Evidence: Textual

American Diploma › Digital SAT Reading and Writing — Complete Course

What this question type tests

Command of Evidence: Textual questions check one thing: can you find the piece of evidence that fits a claim exactly? The passage gives you a claim — a scientist's hypothesis, a historian's argument, or a critic's reading of a poem or novel. The four choices are possible pieces of evidence. Your job is to pick the one that most directly supports, weakens or illustrates that claim.

These questions appear in two main forms:

On the Digital SAT, Command of Evidence — Textual belongs to the Information and Ideas domain, together with Central Ideas and Details, Command of Evidence — Quantitative, and Inferences. These four skills together make up about 26% of the scored Reading and Writing questions (12–14 questions across both modules). Each question has one short passage of 25–150 words and four choices. Inside a module, Information and Ideas questions usually come after the Craft and Structure questions (vocabulary, purpose, two texts) and before the grammar questions.

The good news: these questions are very learnable. You do not need outside knowledge about birds, history or poetry. Everything you need is in the passage. What you need is a careful method, because the wrong choices are designed to look relevant.

The method: claim → parts → match

1. Find the exact claim. Read the last one or two sentences first — the claim is usually there ("The researchers hypothesize that…", "The critic argues that…"). Underline it in your head. Do not use the topic of the passage; use the claim.
2. Check the direction. Read the question stem: support, weaken, or illustrate? Many students lose points by choosing a perfect supporter when the question asked for a weakener.
3. Split the claim into parts. Most claims have two or three parts: a cause and an effect, a group and a result, a feeling and its object, or a "both X and Y". Write them mentally as Part 1 + Part 2.
4. Predict what the perfect evidence would look like. Before you read the choices, finish this sentence: "The researcher would be happy to learn that…" (support) or "The researcher would be worried to learn that…" (weaken).
5. Test each choice against ALL parts. A choice that matches only one part is wrong, even if it uses the same words as the passage. Cross out off-topic and half-right choices.
6. Choose the most direct link. If two choices seem possible, pick the one that needs no extra assumptions. The SAT word "directly" means: you should not have to add a missing step yourself.

Support vs weaken: the logic

Most hypothesis questions are about cause and effect: "X causes Y" or "X happens because of Y". Learn the four patterns below — they cover almost every support/weaken question.

Two more ideas help a lot:

• A comparison needs a control group. "Students who used the app scored 80%" proves nothing alone. "Students who used the app scored 80%, while similar students who did not use it scored 65%" supports the app.
• Weakening is not the same as being unrelated. A choice that is simply off-topic does not weaken anything. To weaken, the choice must make the claim less likely to be true.
• Strength does not matter as much as fit. A choice does not need to prove the claim 100%; it needs to be the one that bears most directly on the claim.

Quotation questions (poems, novels, plays, essays)

In a quotation question, the passage tells you what a critic or a student says about a literary text, then asks which quotation from that text best illustrates the claim. Use the same method, but think about meaning in the words:

1. Find the claim and name its parts: for example, "the speaker feels both pride and sadness about leaving home" has three parts (pride, sadness, leaving home).
2. Read each quotation literally first. What does it actually say? Then ask: which words show Part 1? Which show Part 2?
3. Reject quotations that only describe the setting, mention the topic without the feeling, or show only one of the feelings.
4. Be careful with figurative language: "my heart was a stone" shows coldness or sadness, not anger. Translate the image into a simple feeling before you match it.

Worked examples

Worked example 1 — Support a hypothesis

Great tits are small songbirds found in both forests and cities. Traffic produces a deep, low-pitched rumble that can cover up low notes in a bird's song. Ecologist Lina Moretti hypothesizes that great tits living in cities sing at a higher pitch specifically so that their songs can be heard over traffic noise.

Question: Which finding, if true, would most directly support Moretti's hypothesis?

• A) Great tits living in cities have a larger average body size than great tits living in forests.
• B) Great tits living in cities sing more songs per hour than great tits living in forests do.
• C) Within the same city, great tits near busy roads sang at a higher pitch than great tits in quiet parks, and the birds near roads lowered their pitch on days when the roads were closed to cars.
• D) Several other bird species that live in cities have songs that are naturally lower in pitch than the songs of great tits.

Answer: C

• A — ✗ Wrong. Off-topic. Body size is not part of the claim, which is about pitch and traffic noise.
• B — ✗ Wrong. Half-right trap. It compares city and forest birds, but it is about the NUMBER of songs, not their pitch, and says nothing about traffic.
• C — ✓ Correct. It matches all parts: higher pitch (Part 1) linked to traffic noise (Part 2). Both comparisons keep everything else the same (same city, same birds), and pitch drops when the noise is removed — exactly the pattern for "X causes Y".
• D — ✗ Wrong. Irrelevant comparison. Other species' natural pitch tells us nothing about why great tits change their pitch.

Lesson: notice the word "specifically". A choice that only shows "city birds sing higher than forest birds" would be weaker than C, because cities differ from forests in many ways (light, food, buildings). C isolates traffic noise.

Worked example 2 — Weaken a claim

In 1852, a railway line reached the small textile town of Haverbrook. By 1870, Haverbrook had become one of the largest towns in its region. Historian Samuel Okafor argues that the railway was the main cause of the town's rapid population growth, because it allowed the mills to send cloth cheaply to distant markets.

Question: Which finding, if true, would most directly weaken Okafor's argument?

• A) Haverbrook's population had already doubled in the ten years before the railway arrived and grew more slowly in the ten years after 1852.
• B) Most of the goods carried on the Haverbrook railway in the 1850s were rolls of cloth headed for coastal ports.
• C) Several other textile towns in the region also grew quickly after railway lines reached them.
• D) Haverbrook's mills employed thousands of workers, many of whom had moved from nearby farms.

Answer: A

• A — ✓ Correct. The claim says the railway caused the fast growth. If the fastest growth happened BEFORE the railway, and growth slowed afterwards, the cause must be something else. Pattern: "Y started before X".
• B — ✗ Wrong. Reversed direction. This supports Okafor: it shows the railway was used to send cloth to markets.
• C — ✗ Wrong. Reversed direction. A similar pattern in other towns makes the railway explanation more believable, not less.
• D — ✗ Wrong. Neutral fact. Workers moving to mills explains how people came, but it does not show that the railway was or was not the main cause.

Worked example 3 — Quotation from a poem (two-part claim)

In the poem "The House on Mill Street," the speaker returns to her childhood home after many years. A student claims that the speaker feels both affection and frustration toward the old house.

Question: Which quotation from the poem most effectively illustrates the student's claim?

• A) "The window where I watched the swallows nest / still catches the gold of every late afternoon."
• B) "Seven rooms, a stair of fourteen steps, / a kitchen painted green the year I left."
• C) "The door still sticks, the roof still leaks its grief / onto the hallway floor I swept for years."
• D) "I curse the stubborn lock that never turns, / and yet I hold its key against my heart."

Answer: D

• A — ✗ Wrong. Half-right. The warm memory of the swallows and the gold light shows affection, but there is no frustration.
• B — ✗ Wrong. Off-topic description. A list of rooms shows neither feeling; it only describes the setting.
• C — ✗ Wrong. Half-right. A sticking door and leaking roof suggest frustration (and maybe sadness), but nothing shows affection.
• D — ✓ Correct. Both parts in one quotation: "I curse the stubborn lock" = frustration; "and yet I hold its key against my heart" = affection. The words "and yet" signal the two feelings together.

Worked example 4 — Quotation from a novel (matching the right meaning)

In a novel set in Alexandria in the 1950s, Nadia runs a small fabric shop with her brother. A literary critic argues that Nadia is portrayed as extremely careful with money.

Question: Which quotation from the novel most effectively illustrates the critic's claim?

• A) "Nadia was careful on the stairs, always holding the rail, since the steps were old and uneven."
• B) "Each evening Nadia counted the coins twice, wrote the total in her notebook, and refused to buy new thread until the old spool was empty."
• C) "Nadia's brother spent his wages on cinema tickets and sweets for the neighborhood children."
• D) "The shop's shelves were stacked with silk from Damascus and cotton from the Delta."

Answer: B

• A — ✗ Wrong. Word-match trap. It uses the word "careful", but she is careful about her safety, not about money.
• B — ✓ Correct. It shows exactly the claim: counting the money twice, recording it, and refusing to spend until it is necessary are all signs of being extremely careful with money.
• C — ✗ Wrong. Wrong character. This describes her brother's spending; at most it hints at a contrast, but it says nothing directly about Nadia.
• D — ✗ Wrong. Setting only. The shop's stock tells us nothing about how Nadia handles money.

Practice

All pages in this course

Start here

• The Digital SAT: Complete Overview
• Time Strategy and How to Attack Every Question

Craft and Structure

• Words in Context
• High-Value Vocabulary for SAT Reading and Writing
• Text Structure and Purpose
• Cross-Text Connections

Information and Ideas

• Central Ideas and Details
• Command of Evidence: Textual
• Command of Evidence: Quantitative
• Inferences

Standard English Conventions

• Sentence Boundaries
• Commas and Extra Information
• Colons, Dashes and Semicolons
• Subject–Verb Agreement
• Pronouns
• Verb Tense, Aspect and Finiteness
• Modifiers, Parallel Structure and Comparisons
• Plurals and Possessives

Expression of Ideas

• Transitions
• Rhetorical Synthesis (Student Notes)

Full practice tests

• Digital SAT Reading and Writing — Practice Test 1
• Digital SAT Reading and Writing — Practice Test 2
• Digital SAT Reading and Writing — Practice Test 3