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All pens are pencils. All pencils are erasers. Which conclusion follows?

A. All pens are erasers ✅
B. No pens are erasers
C. Some pens are not erasers
D. None of these

Explanation

  • This is a valid chain syllogism
  • Pens subset of Pencils, Pencils subset of Erasers
  • Therefore, all pens are erasers