Statements: All medicines are drugs. No drug is a food. Which conclusion follows?
- A. Some medicines are foods
- B. No medicine is a food
- C. All foods are drugs
- D. Some drugs are medicines only
Explanation
Medicines lie inside drugs, and drugs are wholly excluded from foods, so medicines are excluded as well. The exclusion inherited by a subset is the key move in every syllogism of this shape. The third option illegitimately reverses a negative premise.
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