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No reptiles are mammals. All snakes are reptiles. Therefore, no snakes are mamma

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Question: No reptiles are mammals. All snakes are reptiles. Therefore, no snakes are mammals. Is this conclusion valid?

Options:

  1. Yes
  2. No
  3. Only if all reptiles are snakes
  4. Only if some mammals are reptiles

Correct Answer: Yes

Solution: 

The conclusion is valid because if no reptiles are mammals and all snakes are reptiles, then it follows that no snakes can be mammals.

No reptiles are mammals. All snakes are reptiles. Therefore, no snakes are mamma

Practice Questions

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

Questions & Step-by-Step Solutions

No reptiles are mammals. All snakes are reptiles. Therefore, no snakes are mammals. Is this conclusion valid?
  • Logical Deduction – The ability to draw conclusions based on given premises.
  • Syllogism – A form of reasoning in which a conclusion is drawn from two given or assumed propositions (premises).
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