Multiple choice general knowledge math & puzzles

What cannot be used as a reason in a proof?

  1. Theorems

  2. Assumptions

  3. Definitions

  4. Postulates

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B Correct answer
Explanation

In formal mathematical proofs, you must use established truths like theorems, definitions, and postulates. Assumptions (unless part of a temporary hypothesis for contradiction) cannot serve as the final justification for a step in a deductive proof.