noun
categorical statement; definitive assertion
A formal or logical statement that asserts something unconditionally, without qualification. Often used in philosophical or rhetorical contexts.
彼の定言には反論の余地がなかった。
His categorical statement left no room for rebuttal.
この論文では、いくつかの定言が前提として置かれている。
In this paper, several definitive assertions are laid down as premises.