non sequitur
A logical fallacy where the conclusion does not follow from the premises. Used in formal logic, debate, and critical thinking contexts.
His argument is full of non sequiturs.
This conclusion is a typical example of a non sequitur.
A broader term for logical fallacies in general, while 不合理推論 specifically refers to the non sequitur fallacy.
Compound of 不合理 (irrational, unreasonable) and 推論 (inference, reasoning). The exact historical derivation is uncertain, but it is a modern technical term for the logical fallacy.