Inferences
On every Reading & Writing section, you'll get short passages that ask you to fill in the blank or pick what 'logically follows.' These reward you for staying glued to the text — and punish you for guessing what's 'probably true.'
| Type | Words | What the inference does |
|---|---|---|
| Contrast | however, but, yet, challenges | Goes against the prior idea |
| Condition | only when, unless, if | Result is limited to certain cases |
| Cause/result | because, therefore, thus | One thing leads to another |
Signal words tell you the logical direction your inference must follow.
When a passage says a finding "challenges the assumption that X," the inference is that X may be wrong. When it says something held "only when" a condition was met, the inference is that the result is conditional — it doesn't always happen.
Highlighting signal words shows the prior assumption is being weakened — so the inference should say it may be wrong.
Check your understanding with a question from this topic:
In a 2024 study of workplace productivity, researchers at Stanford University found that employees who worked remotely three days per week were equally productive as those in the office full-time, but reported 25% higher job satisfaction. Notably, the productivity equivalence held only when remote workers had access to a dedicated workspace at home; those working from shared or improvised spaces showed a 12% productivity decrease.
The passage suggests that the relationship between remote work and productivity is
Worked examples
A botanist observed that a certain desert shrub produced more flowers in years with heavier-than-average rainfall. In drought years, the same shrubs produced few flowers but grew deeper root systems.
Which choice most logically completes the text? The shrub's response to its environment suggests that the plant ___
A 2023 review found that students who took handwritten notes recalled lecture material better on conceptual questions than students who typed notes. However, the typists outperformed the handwriters on questions that required recalling exact facts and figures.
It can reasonably be inferred that the most effective note-taking method ___
For decades, paleontologists assumed that large predatory dinosaurs hunted alone. But a newly discovered fossil bed in Utah contains the remains of several individuals of the same predatory species, all killed in a single event and preserved together.
The passage most strongly suggests that the new fossil bed ___
Common pitfalls
An answer can be a fact you know is true and still be wrong if this passage doesn't support it. Only use the text in front of you — your outside knowledge is a trap here.
When the passage says a finding challenges or contradicts an idea, students sometimes pick the choice that confirms it. Underline however, but, and challenges and double-check the direction before choosing.
Words like always, never, proves, and entirely usually overstate what a short passage can support. Prefer cautious wording (may, some, depends) unless the text is genuinely absolute.
Phrases like only when or unless make a result conditional. The inference must reflect that the outcome happens under certain conditions, not in general.
Key takeaways
An inference must be PROVABLE from the passage — if you can't point to the words, it's wrong.
Signal words (however, but, only when, because, challenges) reveal the logical relationship that the answer must match.
Wrong answers tend to go too far, reverse the logic, or smuggle in outside info.
When choices are close, pick the more cautious, less extreme one.
Predict the answer in your own words before reading the choices.
Watch & learn
Curated Khan Academy walkthroughs on Inferences. They're complementary to this lesson — watch one if a written explanation isn't clicking, or after to reinforce.
Try it yourself
5 practice questions on Inferences, drawn from the question bank. The tutor is one click away if you get stuck.