na-adjective
assertive; insistent; categorical
Rare term used for statements or attitudes that are firm, definitive, and leave no room for doubt. More common in formal writing than in everyday speech.
彼の断言的な口調に、反論する気が失せた。
His categorical tone made me lose the will to argue.
na-adjective
Philosophical use, often in logic or ethics, referring to unconditional or absolute propositions. Extremely rare outside academic contexts.
See also: 定言的
カントの倫理学では、断言的命令が重要な概念である。
In Kant's ethics, the categorical imperative is an important concept.
Means 'firm' or 'resolute', often describing a person's attitude. 断言的 focuses on the nature of a statement rather than personal resolve.
Compound of 断言 (assertion) + 的 (-like, -ive). The exact historical derivation is uncertain, but the word follows a common pattern for forming adjectival nouns from Sino-Japanese nouns.