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Inferences

Complete a passage's unfinished logic with the conclusion it forces — not the one that merely sounds plausible.

⏱ 8 min📍 Learn first: Central Ideas and Details
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Learn Inferences in the format that works for you

Start with a quick audio review, take the deeper podcast lesson, or move directly into the visual guide and knowledge check below.

13 free resources
00:00 / 01:25

Spot Logically Guaranteed SAT Inference Answers

A short spoken refresher on this concept.

00:00 / 21:32

Evidence Before Imagination

The full lesson, worked through in depth.

Concept Snapshot

Definition
Inference questions end a passage with a blank and ask which choice "most logically completes the text."
What the SAT tests
Following premises to their necessary conclusion; the answer must be fully supported by what's stated.
Key rule
The right answer adds NOTHING new. It only connects what the passage already established.
Most common mistake
Choosing a reasonable real-world conclusion that the passage's specific premises don't guarantee.
Prerequisite
Central Ideas and Details

Visual Explanation

What to picture: The right answer adds NOTHING new. It only connects what the passage already established.

A diagram for this concept is in production. Until it is ready, the worked example below shows the same relationship step by step.

Concept Mind Map

DefinitionInference questions end a passage with a blank and ask which choice "most logically completes the text."
Key ruleThe right answer adds NOTHING new. It only connects what the passage already established.

Inferences

Info & Ideas

Complete the LogicPremises build toward a blank; the answer is what must follow.
Reconcile Two FindingsTwo facts seem to conflict; the answer resolves them.
Outside-Knowledge TrapDistractors are true in the real world but unsupported by the text.

How the SAT Tests It

Pattern

Complete the Logic

Premises build toward a blank; the answer is what must follow.

Clue: "most logically completes"
Pattern

Reconcile Two Findings

Two facts seem to conflict; the answer resolves them.

Clue: "however", "yet" before the blank
Pattern

Outside-Knowledge Trap

Distractors are true in the real world but unsupported by the text.

Clue: Plausible answers with no textual anchor

Worked Example

"Researchers assumed the desert moth navigated by moonlight. But specimens navigated accurately even on moonless nights, and moths with covered eyes became disoriented immediately. Therefore, _____"

Find what the two experimental facts FORCE us to conclude.
(1) Accurate navigation without moonlight. (2) Vision blocked → disoriented. So: vision matters, moonlight doesn't.
"They navigate by stars" — possible, but nothing establishes stars specifically. Too specific.
The moths rely on some visual cue other than moonlight. Exactly what the premises prove — no more, no less.

Try It Yourself

"City trees grow more slowly than rural trees of the same species. Scientists suspected air pollution, but trees in low-pollution cities grew just as slowly. Soil samples then revealed that urban soil is compacted to nearly twice the density of rural soil, restricting root growth. Therefore, _____" Which choice most logically completes the text?

Common Traps

What students do

Rewarding plausibility instead of support.

Why it fails

Distractors are written to sound sensible — your real-world knowledge works against you here.

Do this instead

For each option ask: which sentence proves this? No sentence, no answer. Prefer cautious wording over bold claims.

Interactive Flashcards

Review deckCard 1 of 8

Four-Question Knowledge Check

4 quick questions drawn from this concept's own snapshot, patterns and traps.

Question 1 of 4. Which statement is the key rule for this concept?

Audio Lesson

Evidence Before Imagination

Premise-tracking for logical-completion questions.

00:00 / 21:32

21:32 · the full lesson

What to notice

The right answer adds NOTHING new. It only connects what the passage already established.

What the lesson covers

  • 0:00 What inference means here
  • 1:30 Premise inventory
  • 3:00 Strength calibration
  • 4:40 Practice

Study Guide and Transcript

One-page study guide

The snapshot, the key rule, the patterns and the traps, on one page.

Source-Grounded AI Tutor

Ask the Inferences notebook

A tutor grounded in this concept's own sources — ask for a simpler explanation, another example, or why a particular answer is wrong. It is in development and will appear here once its sources pass academic review.

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