Statements: All humans are mammals. Some mammals are not animals. Conclusions: I. Some humans are not animals. II. All animals are mammals. III. All humans are animals.
Correct answer: A. None of the conclusions follow
- A. None of the conclusions follow
- B. Only II follows
- C. Only III follows
- D. Only I follows
Explanation
The given statements are: 'All humans are mammals' and 'Some mammals are not animals.' These statements do not establish a direct relationship between 'humans' and 'animals,' nor do they suggest that all mammals are animals. Conclusion I incorrectly infers a relationship between humans and animals. Conclusion II assumes all animals are mammals without sufficient basis. Conclusion III incorrectly assumes all humans are animals. Therefore, none of the conclusions logically follow from the given statements.
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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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