Free LSAT Practice Question

Question 1 of 1
ID: LSAT-LR-142
Section: Logical Reasoning
Topic: Principle
Difficulty level: Medium

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Chemist: Our assay's endpoint shifts with the trace iron in the buffer salt, and that varies from supplier to supplier. Our published papers gave the grade of the salt but not the supplier. So the papers as they stand cannot be repeated. We therefore owe our readers a correction.

Which one of the following principles most helps to justify the chemist's reasoning?

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