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Statements: All fans are lights. Some lights are bulbs. Conclusions: I. Some fans are bulbs.
II. No fan is a bulb. Which conclusion(s) follow?

Competition practiceSyllogism
  • AOnly conclusion I follows
  • BOnly conclusion II follows
  • CNeither conclusion I nor II follows
  • DEither conclusion I or II follows

Step-by-Step Solution

No definite link between fans and bulbs exists, so neither is certain alone; but 'some fans are bulbs' and 'no fan is a bulb' form a complementary pair, so either I or II follows.
Answer: D) Either conclusion I or II follows

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