蓋然性

• 読み: がいぜんせい
• ローマ字: gaizensei
• 漢字の分解: 蓋 (gai) — cover, lid, probably; 然 (zen) — thus, natural; 性 (sei) — nature, quality, property
• 発音: /ɡai.zen.seː/

意味

Probability; likelihood; the degree to which something is plausible or likely to occur. Used in academic, philosophical, and logical contexts.

A formal noun derived from Western philosophical terminology (cf. German Probabilität). It refers to the evidential or logical weight behind a proposition's likelihood, and is distinct from mere possibility (可能性). Common in academic papers, jurisprudence, and scientific reasoning where precision of meaning matters.

例文

1. この仮説の蓋然性は、現時点では低いと判断せざるを得ない。
2. 法廷では事件の蓋然性を証拠によって立証しなければならない。
3. 蓋然性の高い予測を立てるには、十分なデータが必要だ。

使い方ガイド

場面: academic writing, philosophy, law

トーン: analytical

起源と歴史

Borrowed from Western philosophy via Meiji-era translation. 蓋 carries the sense of 'approximately' or 'probably', 然 means 'thus/natural', and 性 denotes a quality or property.

文化的背景

時代: Meiji–Modern

世代: Adults

社会的背景: Academic/Professional