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Statements: All keys are locks. Some locks are doors. Conclusions: I. Some keys are doors.
II. Some doors are keys. Which conclusion(s) follow?

Competition practiceSyllogism
  • AOnly conclusion I follows
  • BBoth conclusions I and II follow
  • CNeither conclusion I nor II follows
  • DOnly conclusion II follows

Step-by-Step Solution

The locks that are doors need not be keys, so no definite link exists between keys and doors; neither conclusion follows, and they are not a complementary pair.
Answer: C) Neither conclusion I nor II follows

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