SAT Reading & Writing · Information and Ideas

Inferences on the Digital SATWhat it tests, how to approach it, and where students get trapped

Selecting the statement that most logically completes a passage's reasoning — strictly bounded by what the text actually establishes.

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Inferences in Our Question Bank

44

Total questions

16

Easy

12

Medium

16

Hard

These counts cover the full Grind1600 bank. On the Free plan you get the first 5 easy, 5 medium, and 5 hard questions in Information and Ideas.

What the SAT Actually Tests

Inference questions end a passage with a blank preceded by 'therefore' or 'this suggests that' and ask what most logically completes the text. Despite the name, they reward the smallest possible step beyond the text — the correct completion is almost forced by the premises.

Treat the passage as premises in an argument and ask: what conclusion do these premises support? The right answer synthesizes stated facts without going beyond them. Wrong answers require outside knowledge, overreach with words like 'all' or 'never,' or introduce a new topic the premises never touched.

Common Inferences Question Patterns

Pattern 1A passage ending with a conclusion blank and asking what most logically completes the text.
Pattern 2Several stated observations that support one cautious next step.
Pattern 3Choices that are plausible in the real world but stronger than the passage allows.

A Step-by-Step Strategy

  1. 1

    List the premises

    Reduce the passage to the two or three facts that actually support the conclusion.

  2. 2

    Find the shared direction

    Ask what those facts establish together that neither establishes alone.

  3. 3

    Predict the smallest step

    Prefer a qualified conclusion that requires no outside information.

  4. 4

    Run the evidence test

    For each choice, point to the exact premise supporting every part of it.

Original Inferences Practice Questions

These fixed public samples come from Grind1600's original question bank. Choose an answer and check your reasoning before reading the explanation.

Question 1easy
The city of Riverside recently installed solar-powered streetlights along its main boulevard. These new lights cost 40% less to operate than the old electric streetlights they replaced. Additionally, the solar lights require less frequent maintenance because they have fewer mechanical components. The city council plans to expand the solar streetlight program to residential neighborhoods next year. Based on the text, what can most reasonably be inferred about the city council's decision to expand the solar streetlight program?
Question 2medium
In the mid-nineteenth century, Hungarian physician Ignaz Semmelweis observed that the mortality rate from childbed fever was dramatically higher in a maternity ward staffed by medical students than in a ward staffed by midwives. Semmelweis noticed that the medical students often came directly from performing autopsies to delivering babies without washing their hands. When he instituted a policy requiring hand-washing with a chlorinated lime solution, the mortality rate in the students' ward dropped to levels comparable to the midwives' ward. Despite this striking evidence, Semmelweis's colleagues largely rejected his findings, and he was eventually dismissed from his position. Based on the text, what can most reasonably be inferred about the medical establishment's response to Semmelweis?
Question 3easy
Linguist Carlos Mendez studied how bilingual children switch between languages in conversation, a phenomenon known as code-switching. Mendez found that bilingual children do not switch languages randomly; instead, they tend to switch at natural grammatical boundaries in sentences and are more likely to use whichever language is better suited to the specific topic being discussed. These findings challenge the outdated view that code-switching reflects confusion or incomplete mastery of either language. Based on the text, what can most reasonably be inferred about code-switching in bilingual children?

Traps to Avoid

  • Choosing the most interesting or plausible-sounding completion instead of the most strictly supported one.
  • Selecting answers with absolute language when the premises only support a qualified claim.
  • Completing with a restatement of one premise rather than a conclusion drawn from them together.

Difficulty Progression

1. Foundation

Reject choices that contradict or introduce information absent from the text.

2. Developing

Combine two explicit facts into a narrow supported conclusion.

3. Advanced

Handle scientific or historical passages where the supported conclusion is carefully qualified.

Official taxonomy: College Board Reading & Writing skills and question descriptions. Strategy and progression labels are Grind1600 editorial guidance. Last reviewed August 29, 2026.

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More Information and Ideas Skills

Central Ideas & Details

Identifying a passage's main idea and locating the specific details that support it — the core reading-comprehension skill on the SAT.

Command of Evidence (Textual)

Choosing the quotation or finding that most directly supports, illustrates, or weakens a stated claim or hypothesis.

Command of Evidence (Quantitative)

Using data from tables and graphs to complete or support a passage's argument — reading the graphic precisely is the whole game.

Continue With Information and Ideas Practice

Practice is sorted by domain and difficulty. On the Free plan you get the first 5 questions of each difficulty in Information and Ideas. Pro opens every question in the bank.

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Last reviewed August 29, 2026 · Grind1600 Editorial Team