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All mammals have lungs. Some animals with lungs are not mammals. Therefore, some

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Question: All mammals have lungs. Some animals with lungs are not mammals. Therefore, some mammals are not animals with lungs. Is this conclusion valid?

Options:

  1. Yes
  2. No
  3. Only if all animals with lungs are mammals
  4. Only if some mammals do not have lungs

Correct Answer: No

Solution: 

The conclusion is not valid because it does not logically follow that some mammals are not animals with lungs, given that all mammals have lungs.

All mammals have lungs. Some animals with lungs are not mammals. Therefore, some

Practice Questions

Q1
All mammals have lungs. Some animals with lungs are not mammals. Therefore, some mammals are not animals with lungs. Is this conclusion valid?
  1. Yes
  2. No
  3. Only if all animals with lungs are mammals
  4. Only if some mammals do not have lungs

Questions & Step-by-Step Solutions

All mammals have lungs. Some animals with lungs are not mammals. Therefore, some mammals are not animals with lungs. Is this conclusion valid?
  • Logical Reasoning – The question tests the ability to analyze logical statements and conclusions based on premises.
  • Syllogism – The question involves understanding syllogistic reasoning, where premises lead to a conclusion.
  • Categorical Logic – The question examines the relationships between categories (mammals, animals with lungs) and their properties.
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