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Statements: Some pens are blue. Some blue are markers. Conclusions: I. Some pens are markers.
II. No pen is a marker. Which conclusion follows?

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

Step-by-Step Solution

The overlap between pens and markers is undetermined, so neither is individually certain, but the two conclusions are complementary and together exhaust all cases. Hence either I or II follows.
Answer: D) Either I or II follows

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