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Statements: All pens are red. Some red things are blue. Conclusions: I. Some pens are blue.
II. No pen is blue.

Competition practiceSyllogism
  • ANeither I nor II follows
  • BOnly II follows
  • COnly I follows
  • DEither I or II follows

Step-by-Step Solution

Neither conclusion is definitely true, but they form a complementary pair (some pens are blue vs. no pen is blue) that together exhausts all cases, so either I or II follows.
Answer: D) Either I or II follows

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