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Statements: Some pens are red. Some pens are blue. Conclusions: I. Some red things are blue.
II. No red thing is blue. Which conclusion(s) logically follow?

Competition practiceSyllogism
  • ANeither I nor II follows
  • BEither I or II follows
  • COnly II follows
  • DOnly I follows

Step-by-Step Solution

Neither conclusion is individually certain, but 'Some red are blue' and 'No red is blue' are contradictory and together cover every case, so it is an either-or pair.
Answer: B) Either I or II follows

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