expression, noun
leap of logic; logical jump
Refers to an unjustified step in reasoning where a conclusion does not follow from the premises.
彼の主張には論理の飛躍がある。
There is a leap of logic in his argument.
その結論に至るまでに論理の飛躍があった。
There was a logical jump in reaching that conclusion.
Compound of 論理 (logic) and 飛躍 (leap, jump). The exact origin is uncertain, but it is a calque-like expression used in logical and critical contexts.