rhyme or reason
没有头绪，毫无道理或逻辑
口语·表达困惑或不解
英文释义
logic or explanation; a sensible or rational basis for something
例句
I can't make rhyme or reason of his decision to quit his job without a backup plan.
典故来源
源自16世纪，最初用于诗歌和逻辑，强调事物应有韵律或理由，后演变为否定形式表示毫无逻辑。