仮定|かていkatei[0]heiban (flat)

1. noun, suru verb, transitive verbassumption; supposition; hypothesis
   彼女かのじょがここにいると仮定かていしてみよう。↗

   Let's suppose that she is here.
2. noun, grammarsupposition

• Synonym想定そうていNeutralEnvisions in advance a situation that may occur, as in 「想定外」; 「仮定」 sets up a premise temporarily for discussion.
• Synonym仮想かそうNeutralImagining something as if it were real, as in 「仮想敵」; 「仮定」 focuses on a logical hypothetical premise.
• Synonym仮説かせつWrittenWritten register. A claim put forward to explain something unknown and awaiting testing, as in 「仮説を立てる」; 「仮定」 is a temporary condition set in reasoning.
• Synonym前提ぜんていNeutralA premise or prerequisite taken as already established; 「仮定」 is a temporary assumption.
• Related推定すいていWrittenWritten register. Concluding from evidence, as in 「推定年齢」; 「仮定」 requires no evidence.
• Related推測すいそくNeutralGuessing or conjecturing; 「仮定」 is a premise you set deliberately, not an inference.
• Related推察すいさつWrittenWritten register. Sizing up a matter or someone's feelings from the circumstances; 「仮定」 is a logical assumption.
• Related推論すいろんWrittenWritten register. The process of reasoning itself; 「仮定」 is its starting point.
• RelatedみなすNeutralA verb meaning to regard or treat something as, as in 「欠席と見なす」; 「仮定」 is an assumption.
• Related決め込むきめこむNeutralAssuming something one-sidedly or wishfully, or pretending; 「仮定」 is a conscious assumption.
• Related憶測おくそくNeutralSpeculating from uncertain clues, often with a negative nuance, as in 「憶測を呼ぶ」; 「仮定」 is set deliberately while knowing it is undetermined.
• Related想像そうぞうNeutralImagining, not necessarily based on anything; 「仮定」 is used for reasoning.
• Related推量すいりょうWrittenWritten register. Conjecture; also the grammar term for expressing conjecture. 「仮定」 is an assumption.
• Related憶断おくだんWrittenWritten register. Jumping to hasty conclusions, with a negative nuance; 「仮定」 is set deliberately.
• Related思いなすおもいなすWrittenWritten register, rare in use. Being convinced that something is so; 「仮定」 is an assumption.
• Related措定そていWrittenWritten register. A philosophy and logic term for positing something, such as a proposition or subject, together with its definition; 「仮定」 is more everyday.
• Related推知すいちWrittenWritten register, rare in use. Coming to know something by inference; 「仮定」 is a hypothetical premise.
• Related臆度おくたくWrittenWritten register, rare in use. Conjecturing without solid grounds; 「憶測」 is the usual word.
• Antonym確定かくていNeutralBeing settled or fixed; the opposite of the hypothetical nature of 「仮定」.
• Antonym事実じじつNeutralA fact; the opposite of the assumption 「仮定」.
• Antonym現実げんじつNeutralReality; the opposite of the hypothetical 「仮定」.

Use 「仮定」 for a premise set up temporarily for the sake of discussion, as in 「仮定の話」 or 「〜と仮定する」. For envisioning in advance choose 「想定」, for a testable hypothesis 「仮説」, for the virtual 「仮想」, for fact 「事実」. Words like 「推定」「推測」「推察」「推論」「推量」 are about inferring or guessing, not deliberately setting a premise; 「前提」 is a basis already accepted; 「見なす」 and 「決め込む」 are verbs for regarding or assuming; 「憶測」 and 「憶断」 carry a negative nuance; 「想像」 is imagining that need not rest on any basis; 「措定」 is a philosophy term.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 事実じじつや真偽しんぎに関係かんけいなく、仮かりにこうと定さだめること。
2. 推論すいろんの出発点しゅっぱつてんとなる条件じょうけん。仮設かせつ。