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Statement: No birds are mammals. Argument: Therefore, all mammals are not birds.

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Question: Statement: No birds are mammals. Argument: Therefore, all mammals are not birds.

Options:

  1. The argument is valid.
  2. The argument is invalid.
  3. The argument is a contradiction.
  4. The argument is a fallacy.

Correct Answer: The argument is invalid.

Solution: 

The argument is invalid because the statement only indicates that no birds are mammals, not that all mammals cannot be birds.

Statement: No birds are mammals. Argument: Therefore, all mammals are not birds.

Practice Questions

Q1
Statement: No birds are mammals. Argument: Therefore, all mammals are not birds.
  1. The argument is valid.
  2. The argument is invalid.
  3. The argument is a contradiction.
  4. The argument is a fallacy.

Questions & Step-by-Step Solutions

Statement: No birds are mammals. Argument: Therefore, all mammals are not birds.
  • Logical Deduction – Understanding the relationship between categories and the implications of statements.
  • Negation – Recognizing that the negation of a statement does not imply the negation of its converse.
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