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### Course: LSAT (DEPRECATED) > Unit 1

Lesson 3: Analytical Reasoning – Articles- Getting started with Analytical Reasoning
- How to approach ordering setups
- How to approach grouping setups
- How to approach mixed setups
- Given info: basic orientation | Quick guide
- Given info: could be true/false | Quick guide
- Given info: must/cannot be true/false | Quick guide
- New info: could be true/false | Quick guide
- New info: must/cannot be true/false | Quick guide
- Equivalent rule, min-max and completely determines | Quick guide
- Equivalent rule | Learn more
- Study plan for analytical reasoning | Getting more than 10 right
- How to use multiple scenarios in analytical reasoning setups
- Deductions in analytical reasoning | Introduction
- Deductions in analytical reasoning | Practice
- Diagram notation conventions for analytical reasoning setups

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# Given info: must/cannot be true/false | Quick guide

## "Must be true" questions

**Must be true**means that the answer is a statement that is

*always*true, in any circumstance that is acceptable to the rules.

The wrong choices to a “must be true” question are choices that

*could*or*must*be false. They don’t*have*to be true, because you can find at least one viable scenario in which that statement isn’t true.## "Must be false" questions

**Must be false**means that the answer is a statement that is

*always*false—or

**impossible**—in any circumstance that is acceptable to the rules. In other words, the answer

*breaks*at least one of the rules when you implement the statement.

The wrong choices to a “must be false” question are choices that

*could*or*must*be true. They can be possible in at least one scenario.**Top tip:**It can be helpful to think of

**must be false**as “impossible”, and both

**could be true**and

**could be false**as “possible.”

## Checklist

Since you aren’t given new information here, the answer

*is*obtainable from your**initial diagram**and**rules**.**✓ Check your diagram and deductions**

It’s possible that the answer is immediately evident from the deductions you’ve already made. If it’s not immediately evident, eliminate any choices that are obviously wrong from your diagram and rules.

**✓ Test whatever choices remain**

It can be a little tricky to remember how to test choices for

**must**questions.**"Must be true" questions —**Test the choices by*trying*to make the choices false. If you make the statement in the choice false, and you can*still*make an acceptable scenario, eliminate that answer!**"Must be false" questions —**Test the choices by*trying*to make the choices possible. If you can incorporate the info in the choice into your diagram and generate an acceptable scenario, then eliminate that choice!

**Top tip:**If only two choices remain, and you feel confident in your work so far, you can just test one of them—if it accomplishes what you need (whether it’s a

**must be true**or

**must be false**) then it’s the answer! If it doesn’t accomplish what you need, then the

*other*remaining choice is the answer.

## Want to join the conversation?

- I am having trouble with must be true statements(5 votes)
- Do we have enough time to solve must be true/false questions by eliminating the other 4 answer choices? Or is there another commonly used strategy, such as deriving the answer based on rules and logic rather than elimination?(1 vote)