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No birds are mammals. All sparrows are birds. Therefore, no sparrows are mammals

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Question: No birds are mammals. All sparrows are birds. Therefore, no sparrows are mammals. Is this conclusion valid?

Options:

  1. Yes
  2. No
  3. Only if all birds are sparrows
  4. Only if some birds are mammals

Correct Answer: Yes

Solution: 

The conclusion is valid because if no birds are mammals and all sparrows are birds, then no sparrows can be mammals.

No birds are mammals. All sparrows are birds. Therefore, no sparrows are mammals

Practice Questions

Q1
No birds are mammals. All sparrows are birds. Therefore, no sparrows are mammals. Is this conclusion valid?
  1. Yes
  2. No
  3. Only if all birds are sparrows
  4. Only if some birds are mammals

Questions & Step-by-Step Solutions

No birds are mammals. All sparrows are birds. Therefore, no sparrows are mammals. Is this conclusion valid?
  • Syllogistic Reasoning – The question tests the ability to understand and apply syllogistic logic, where premises lead to a conclusion.
  • Logical Deduction – It assesses the ability to deduce conclusions based on given premises.
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