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Statements: No glass is a stone. All stones are rocks. Some rocks are gems. Conclusions: I. Some rocks are not glass.
II. Some gems are stones. Which conclusion(s) follow?

Competition practiceSyllogism
  • AOnly I follows
  • BOnly II follows
  • CBoth I and II follow
  • DNeither I nor II follows

Step-by-Step Solution

The rocks that are stones cannot be glass, so some rocks are not glass: I follows. The gem-rocks need not be stones, so II does not follow.
Answer: A) Only I follows

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