non sequitur

详细解释:【法】 不根据前提的推理, 不合理的推理

英语解释：

名词 non sequitur:

a reply that has no relevance to what preceded it(logic) a conclusion that does not follow from the premises

例句：

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