Must Be True / Inference I: Staying Inside the Stimulus
Must Be True / Inference I: Staying Inside the Stimulus
A genuine shift in task: Inference-family questions aren't arguments to evaluate at all — often just a set of facts, and you're asked what must follow. The standard is the highest on the test: the answer must be guaranteed, not just plausible.
1. No Outside Assumptions
The correct answer must be derivable purely from what's stated — no real-world common sense filling gaps, no "probably." If it requires an assumption to be true, it's wrong.
2. Combining Statements
Must Be True answers frequently combine two stated facts rather than restating just one — especially when conditional logic is present.
3. Reject Anything Extra
An answer that's true of the real world but not forced by the stimulus's specific statements is wrong, no matter how reasonable it sounds.
Practice items on this page are curriculum-authored in LSAT style; they are not official LSAC questions. Real drilling happens on LawHub — see the assignment below.
Q1. Stimulus: "All senior engineers have security clearance. No contractor has security clearance." What must be true?
LawHub drill-tier LR section, untimed. Scan for Must Be True / "follows logically" stems.
Most Strongly Supported tomorrow — a related but slightly looser standard.