素人しろうと判はん断だん

noun

layperson's judgment; amateur opinion

Refers to an opinion or decision made by someone without professional expertise, often implying it may be unreliable or naive.

• 素人しろうと判はん断だんで難むずかしい手しゅ術じゅつを決きめるのは危き険けんだ。

  Deciding on a difficult surgery based on a layperson's judgment is dangerous.

• 彼かれのアドバイスは素人しろうと判はん断だんだから、専せん門もん家かに相そう談だんしたほうがいい。

  His advice is just an amateur opinion, so you should consult a specialist.