If no scientist is dishonest, and some teachers are scientists, which conclusion is valid?

  • A. Some teachers are not dishonest
  • B. No teacher is dishonest
  • C. All teachers are scientists
  • D. Some scientists are teachers only

Explanation

The teachers who are scientists must be honest, so at least some teachers are not dishonest, while the remaining teachers are unknown. Extending this to all teachers is the classic overreach. A some premise limits the conclusion to some, whatever the other premise says.

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