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All roses are flowers. No flowers are weeds. Which conclusion definitely follows?

A. No flowers are roses
B. No roses are weeds ✅
C. Some roses are weeds
D. All roses are weeds

Explanation

  • All A are B, No B are C => No A are C
  • Roses -> Flowers, Flowers and Weeds are disjoint, so Roses and Weeds are disjoint