仮定（かてい、katei）
- assumption

The Japanese word 仮定仮定(かてい - katei) means "assumption," "supposition," "hypothesis," or "presumption." It refers to something that is taken to be true or factual for the purpose of argument or investigation, but is not necessarily known to be so. It can also imply a condition that needs to be fulfilled. This word encapsulates the idea of setting up a base or a starting point of thinking that will later be verified or tested.

⚫︎ 仮定の話をしましょう。 Translation: Let's talk about assumptions. ⚫︎ もし雨が降ったら、遠足は中止です。これは仮定です。 Translation: If it rains, the field trip will be cancelled. This is an assumption. ⚫︎ 科学者は実験を行う前に、いくつかの仮定を立てます。 Translation: Scientists make several assumptions before conducting an experiment.

仮定仮定 is used in various contexts, including: ⚫︎ When presenting a hypothetical situation. ⚫︎ When discussing a condition or requirement. ⚫︎ In academic or scientific discussions where a starting point or premise is needed. ⚫︎ When expressing an uncertain situation. It's often used in formal settings but can also be used in casual conversations.

仮定仮定 is written using the kanji 仮 (ka - temporary, provisional) and 定 (tei - decision, determination, regulation). The reading is かてい (katei) in hiragana. There are no other ways to write this word. The okurigana is fixed, and no variations exist.

⚫︎ 前提 (ぜんてい - zentei): Premise, prerequisite. ⚫︎ 推測 (すいそく - suisoku): Conjecture, guess. ⚫︎ 想定 (そうてい - soutei): Assumption, supposition. ⚫︎ 見込み (みこみ - mikomi): Prospect, expectation.

⚫︎ 事実 (じじつ - jijitsu): Fact, truth. ⚫︎ 現実 (げんじつ - genjitsu): Reality.

実験の結果を予測するために、まずいくつかの仮定を立てました。 ・Translation: To predict the results of the experiment, we first made several assumptions. ・Explanation: This sentence illustrates how 仮定仮定 is used in a scientific context to set a basis for further investigation.

もし彼が正直なら、この[仮定]仮定は正しいはずです。 ・Translation: If he is honest, this assumption should be correct. ・Explanation: This sentence demonstrates 仮定仮定 being used to express a conditional statement with the need of verification.

The word 仮定仮定 is a combination of two kanji: 仮 (ka), which means "provisional," "temporary," or "assumed," and 定 (tei), meaning "to decide," "to fix," or "to determine." Combined, they create the sense of "temporarily deciding" or "establishing a provisional fact," which reflects the core meaning of assumption or hypothesis.