理屈

りくつ

theory, reason

JLPT N1

Character Breakdown

Understanding 理屈

The word 理屈 (りくつ) refers to logic, reason, or theory behind something. It is often used to describe whether an argument or explanation makes sense logically.

Usage in Conversation

理屈 can be used neutrally to mean "reason" or "theory," as in explaining why something is the case. However, it can also carry a slightly negative nuance when someone is "making excuses" or "overcomplicating" things by focusing too much on logic rather than practical matters.

Common Collocations

  • 理屈が通る: "the logic holds" or "makes sense" — used when an argument is reasonable.
  • 理屈をこねる: "to argue or make excuses" — often implies unnecessary or annoying reasoning.
  • 理屈抜きに: "without reasoning" or "without argument" — used to emphasize doing something without overthinking.

Register and Nuance

理屈 is a somewhat formal word, often found in written language or serious conversations. When used in casual speech, especially with こねる (to twist or spin), it can sound critical or impatient.

Common Learner Mistake

Learners sometimes confuse 理屈 with 理由 (りゆう), which also means "reason." 理由 refers more to the cause or motive behind something, while 理屈 focuses on the logical explanation or theory. Remember, 理屈 is about the logic or rationale, not just the cause.

Example Sentences

かれのはなしにはりくつがとおっている。

His story makes sense logically.

りくつではわかっているが、じっさいにはむずかしい。

I understand the theory, but in practice, it's difficult.

りくつをこねるのはやめて、すなおにあやまりなさい。

Stop making excuses and apologize honestly.