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Statements: All lamps are bulbs. No bulb is a fan. Some fans are heaters. Conclusions: I. Some heaters are not lamps.
II. No lamp is a fan. Which conclusion(s) follow?

Competition practiceSyllogism
  • ABoth I and II follow
  • BOnly II follows
  • COnly I follows
  • DNeither I nor II follows

Step-by-Step Solution

Lamps ⊂ bulbs and no bulb is a fan, so no lamp is a fan (II). The heaters that are fans are not bulbs, hence not lamps, so some heaters are not lamps (I). Both follow.
Answer: A) Both I and II follow

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