Question 1

What is a 'necessary assumption' in LSAT logical reasoning?

Accepted Answer

A necessary assumption is a statement that MUST be true for the argument's conclusion to hold. Without it, the argument falls apart entirely.

Question 2

What is a 'sufficient assumption' in LSAT logical reasoning?

Accepted Answer

A sufficient assumption is a statement that, if true, guarantees the conclusion follows. It fills the logical gap completely, making the argument valid.

Question 3

What is the key difference between a necessary assumption and a sufficient assumption?

Accepted Answer

A necessary assumption must be true for the argument to work (its negation kills the argument), while a sufficient assumption guarantees the conclusion on its own if true.

Question 4

What does it mean for a statement to be a valid LSAT 'inference'?

Accepted Answer

A valid inference is a conclusion that must be true based solely on the information given in the stimulus. It cannot go beyond what the premises strictly support.

Question 5

On LSAT Must Be True questions, what standard must the correct answer meet?

Accepted Answer

The correct answer must be guaranteed true based on the stimulus alone—not merely likely, possible, or strongly suggested. If it could be false given the stimulus, it is wrong.

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