Statements: Some birds are parrots. Some parrots are crows. Conclusions: I. Some birds are crows. II. All birds are crows.
Correct answer: D. Neither follows
- A. Only I follows
- B. Only II follows
- C. Both I and II follow
- D. Neither follows
Explanation
This is an invalid syllogism. The "parrots that are crows" might be a completely separate group from the "parrots that are birds." There is no guaranteed overlap between the set of birds and the set of crows.
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About Logical Deductions
Logical deductions require conclusions to be drawn from stated facts, conditions and relationships without adding outside information. The work includes handling all, some and none statements, necessary and sufficient conditions, ordering restrictions, true or false conclusions, and the difference between what must be true and what could be true.
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