non sequitur

英[ˌnɒn'sekwɪtə(r)] 美[ˌnɑːn'sekwɪtər]
  • n.不合理的推论或结论
  • non adv.[拉]非;不是
  • sequitur n.(根据前提得出的)推断;推理;结论
Noun:
  1. a reply that has no relevance to what preceded it

  2. (logic) a conclusion that does not follow from the premises

    1. This non sequitur invalidates his argument.
      他不根据前提推理因而论证无效。