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Statements: All keys are locks. No lock is a door. Conclusions: I. No key is a door.
II. Some locks are keys. Which conclusion(s) follow?

Competition practiceSyllogism
  • ABoth conclusions I and II follow
  • BNeither conclusion I nor II follows
  • COnly conclusion I follows
  • DOnly conclusion II follows

Step-by-Step Solution

All keys are locks and no lock is a door, so no key is a door (I). All keys are locks converts to some locks are keys (II). Both follow.
Answer: A) Both conclusions I and II follow

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