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Deductive Arguments and Validity

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Multiple Choice

Which of the following is an example of a deductively valid argument?

  1. All dogs are mammals. Some mammals are cats. Therefore, some cats are dogs.
  2. All dogs are mammals. All mammals are animals. Therefore, all dogs are animals.
  3. Some dogs are black. All black things are evil. Therefore, some dogs are evil.
  4. All cats are furry. Some furry things are dogs. Therefore, some dogs are cats.
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