Discussion
Statements: All the phones are scales. All the scales are calculators.
Conclusions:
1. All the calculators are scales.
2. All the phones are calculators
3. All the scales are phones.
4. Some calculators are phones.
Answer: C
Correct answer: Only (2) and (4)
All phones are scales and all scales are calculators, so all phones are calculators - conclusion 2 - and therefore some calculators are phones, conclusion 4. Conclusions 1 and 3 reverse universals, which is never valid.
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