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Public Service Entrance Exam (PSEE) · Question

Consider the following statements: 'All birds have feathers. This creature has feathers.' What is the valid conclusion?

While all birds have feathers, other creatures might also have feathers (e.g., a feather decoration). Therefore, having feathers is a necessary characteristic o

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Question: Consider the following statements: 'All birds have feathers. This creature has feathers.' What is the valid conclusion?

Answer options:

  • This creature is definitely a bird.
  • This creature is not a bird. ✅ This creature could be a bird, but not necessarily.
  • All feathered creatures are birds.

Correct answer: This creature could be a bird, but not necessarily.

Explanation: While all birds have feathers, other creatures might also have feathers (e.g., a feather decoration). Therefore, having feathers is a necessary characteristic of birds, but not a sufficient one to prove something is a bird.

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