Premise: Some electric vehicles have solid-state batteries. All vehicles with solid-state batteries support ultra-fast charging. What follows?
Answer and explanation
Correct answer: A. Some electric vehicles support ultra-fast charging
- Step 1: E and S have non-empty intersection. S is subset of U. Step 2. Elements in both E and S must also be in U. Hence some E are in U. Answer: Some electric vehicles support ultra-fast charging. Why not the others: Cannot generalize to all; cannot reverse the subset relation.
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