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Statements: Some A are B. All B are C. No C is D. Conclusions: I. Some A are C.
II. Some A are not D. Which conclusion(s) logically follow?

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

Step-by-Step Solution

Some A are B and all B are C, so some A are C (I). Those A are C, and no C is D, so those A are not D, giving some A are not D (II). Both follow.
Answer: C) Both I and II follow

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