hand waving

Noun

idiomatic

(idiomatic) Discussion or argumentation involving approximation, vagueness, educated guessing, or the attempt to explain or excuse vagaries.

Japanese Meaning

議論や説明において、曖昧さや概算、あるいは推測に頼る、十分な裏付けのない説明・論法を指す。 / 論点をあいまいにし、不十分な根拠で議論を展開すること、またはそのような議論自体。

The committee dismissed his proposal as mere hand waving rather than a rigorous analysis.

委員会は彼の提案を厳密な分析とは見なさず、単なる曖昧な説明として却下した。

Sense（1）

(idiomatic) Discussion or argumentation involving approximation, vagueness, educated guessing, or the attempt to explain or excuse vagaries.

The sales pitch sounded good, but there was a lot of hand waving about the price.

hand wavings

（ plural ）