All pyramids are monuments, and all monuments are structures. Which conclusion must be true?
Answer and explanation
Correct answer: C. All pyramids are structures
- Step 1: Chain the premises: every one of the pyramids is among the monuments, and every one of the monuments is among the structures.
- Step 2: So all pyramids are structures.
Answer
All pyramids are structures.
Why not the others: All structures are pyramids: The statement was reversed, which is not guaranteed. Some pyramids are not structures and No pyramids are structures do not fit.
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