Test the scope of a conclusion
Evaluate evidence and limited inferences.
The idea
A causal explanation needs more support than a before-and-after pattern. A careful inference remains inside the limits of what the passage says.
A method to try
- Find possible alternative explanations.
- Check whether extreme answer wording exceeds the evidence.
Follow the reasoning.
A study finds that volunteers who joined a reading club read more books than non-members. Does membership necessarily cause the difference?
- People who already enjoy reading may be more likely to volunteer for the club. Self-selection is a plausible alternative explanation.
- To judge causality, ask how membership was assigned and whether groups were comparable before joining. The observed association alone does not settle the direction of influence.
- In a verbal reasoning item, choose evidence that addresses this logical gap. An unrelated detail about the club’s room or logo does not help evaluate the causal explanation.
Think it through first.
If a passage says a method may reduce errors, can the supported inference be that it always eliminates errors?
Show the explanation
No.
May is conditional and reduce is weaker than eliminate; the stronger statement exceeds both limits.
Make it your own
After reading, explain the method in your own words and identify the condition that makes it valid. Then try the linked starter practice without referring back to the worked example. Review the reasoning behind an error before repeating the same item; remembering an answer is different from being able to solve a new problem.
This lesson is one part of a short starter pathway. It does not cover the full exam syllabus or establish a predicted score.
Official references
These provider and publisher links explain the exam or underlying concepts. Our lessons and questions are original, independent practice.
View 7 references and checked dates
- ETS — current General Test structure (opens in a new tab)Checked 2026-10-07
- ETS — 2026–27 Information Bulletin (opens in a new tab)Checked 2026-09-29
Live PDF cover: policies effective 1 July 2026–30 June 2027. Search snippets can be stale.
- ETS — General Test registration (opens in a new tab)Checked 2026-09-29
- ETS — appointment scheduling (opens in a new tab)Checked 2026-09-29
Live seats were not checked.
- ETS — POWERPREP products (opens in a new tab)Checked 2026-10-07
- ETS — Quantitative Reasoning overview (opens in a new tab)Checked 2026-10-07
- ETS — Quantitative Reasoning overview (opens in a new tab)Checked 2026-09-29