Some flowers are red. All red things are expensive. Which conclusion must be true?
Answer and explanation
Correct answer: C. Some of them are expensive
- Step 1: Some are red, and every red thing is expensive. Step 2. So at least some of them are expensive. Answer: Some of them are expensive. Why not the others: All of them are expensive is what you get if you extend 'some' to 'all'. None of them is expensive is what you get if you deny the link. Only red ones are expensive is what you get if you add a restriction that is not given.
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