Must Be True Questions LSAT

Must Be True questions are an LSAT Logical Reasoning type that asks which answer choice must be true based only on the information in the stimulus. The correct answer is fully supported by the given statements, with no outside assumptions. They reward careful reading and are also called inference or draw-a-conclusion questions.

By Ali Unar, JD candidate at Georgetown Law and founder of Lovare Institut. Last updated August 2026. Figures on this page were verified in August 2026 or point readers to the current source.

What are Must Be True questions on the LSAT?

Must Be True questions are a Logical Reasoning question type that asks you to identify the statement that must be true given the information in the stimulus. Unlike argument questions, the stimulus is usually a set of facts rather than a conclusion to critique. Your job is to find the answer that is fully proven by those facts, not the answer that is merely likely or reasonable.

How do you recognize a Must Be True question?

The question stem is the giveaway. Common phrasings include if the statements above are true, which one of the following must also be true, and which of the following is most strongly supported by the information above. These stems point to the same task: stay inside the stimulus and pick the answer the text guarantees.

How do you solve Must Be True questions?

Work from the stimulus to the answers, not the other way around. Read the facts closely, combine any statements that link together, and note what they force to be true. Then test each answer against the text and eliminate any choice that requires information the stimulus does not provide.

• Accept only what the stimulus proves, never what merely sounds plausible.
• Watch for strong words like all, none, or must that can overstate what the facts support.
• Reject answers that add new information or outside assumptions.

What should you practice next?

Must Be True questions overlap with other inference tasks such as Most Strongly Supported and cannot-be-true questions, so drilling them together builds a single reliable habit. Practice separating provable answers from tempting but unproven ones under timed conditions. Because Logical Reasoning is two of the three scored LSAT sections, small gains on frequent question types like this one add up quickly.

Frequently asked questions

What is the difference between must be true and most strongly supported LSAT questions?

Must Be True questions require an answer the stimulus fully proves, while Most Strongly Supported questions accept the answer the stimulus makes most likely even if it is not airtight. The tasks are close cousins, and both live in Logical Reasoning. The practical difference is how strict your standard of proof should be when you evaluate each choice.

Are must be true questions the same as inference questions?

Yes. Must Be True questions are one of the main LSAT inference question types, sometimes labeled draw-a-conclusion questions. They ask what follows logically from the stimulus. Other inference-style questions include Most Strongly Supported and Cannot Be True, and all of them reward staying strictly within the information the passage provides.

How do I avoid wrong answers on must be true questions?

The most common trap is choosing an answer that sounds reasonable but is not actually proven by the stimulus. Eliminate any choice that introduces new facts, overstates with words like all or never, or reverses a conditional relationship. If you cannot point to the exact text that guarantees a choice, it is not the must-be-true answer.

How common are must be true questions on the LSAT?

Must Be True and related inference questions appear regularly in each Logical Reasoning section, though the exact number varies by form. see the linked source (see the linked source) Because the LSAT has two scored Logical Reasoning sections, these questions show up often enough that mastering them meaningfully affects your score.

Sources

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Verified August 2026.