Kanji 理 logic, arrangement, reason Related words ファジー 理り 論ろん Synonymous loanword from English 'fuzzy theory', often used interchangeably in technical contexts.
ファジー 集しゅう 合ごう Fuzzy set, a core concept within fuzzy theory.
Written forms 曖あい 昧まい 理り 論ろん
Standard kanji spelling for the computing term 'fuzzy theory'.
あいまい 理り 論ろん
Mixed kana-kanji spelling; the first part is written in hiragana, which may be easier for learners but less common in technical contexts.
Etymology Compound of 曖昧 (あいまい , 'vague, ambiguous') and 理論 (りろん , 'theory'). The term is a direct translation of the English 'fuzzy theory', a concept introduced in the mid-20th century.
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