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Statements: Some stones are rocks. No rock is a gem. Conclusions: I. Some stones are not gems.
II. All gems being stones is a possibility. Which conclusion(s) follow?

Competition practiceSyllogism
  • ABoth conclusions I and II follow
  • BOnly conclusion II follows
  • COnly conclusion I follows
  • DNeither conclusion I nor II follows

Step-by-Step Solution

The stones that are rocks are not gems, so some stones are not gems (I follows). Gems avoid only rocks, so gems could all be non-rock stones, making II a valid possibility.
Answer: A) Both conclusions I and II follow

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