rhyme or reason

名詞

慣用表現否定形理由節不可算名詞

(idiomatic, chiefly in the negative) Logic; common sense.

日本語の意味

論理 / 常識

There seemed to be no rhyme or reason for his sudden departure.

彼の突然の出発には何の道理もなかったようだ。

意味（1）

(idiomatic, chiefly in the negative) Logic; common sense.

Prices vary considerably from one town to another with no apparent rhyme or reason.

rhyme

（ canonical ）