ロジックrojikku

1. nounlogic

• Synonym論理ろんりNeutralNeutral. The most common word for the coherence of thought and argument; largely interchangeable with 「ロジック」, a loanword common in business and programming.
• Synonym論法ろんぽうNeutralNeutral. A method of arguing, as in 「三段論法」; it centers on how an argument is built, while 「ロジック」 centers on the reasoning itself.
• Synonym理屈りくつNeutralNeutral. Sound reasoning, but also strained logic and excuses, as in 「理屈をこねる」; often pejorative, unlike the generally neutral 「ロジック」.
• Related立論りつろんWrittenWritten/formal prose. The act of stating one's case and backing it with reasons, as in a debate; it names the action of arguing, not logic itself.
• Related論理学ろんりがくWrittenWritten/formal prose. The academic discipline studying the laws and forms of thought; 「ロジック」 can also refer to it, but usually means concrete reasoning.

For logic in general, 「論理」 is the default; 「ロジック」 is the loanword choice in business and programming. Use 「論法」 for a line of argument, 「論理学」 for the discipline, 「立論」 for the act of arguing a case, and 「理屈」 for reasoning, sound or twisted.

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

1. 論理ろんり。
2. 論理学ろんりがく。