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

Competition practiceSyllogism
  • AOnly II follows
  • BNeither I nor II follows
  • COnly I follows
  • DEither I or II follows

Step-by-Step Solution

Neither conclusion is established on its own, but 'Some metals are keys' and 'No metal is a key' are complementary and together cover all cases, so either I or II follows.
Answer: D) Either I or II follows

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