Compare: 所為 vs 所為

部屋がほこりっぽいのは掃除機のせい？

Is it the vacuum cleaner's fault that the room is dusty?

ひげを生やしているせいなのか、一見(いっけん)怖そうなのに、実はやさしい人(ひと)だ。

Possibly because he's got a beard, he looks scary at first glance but he's really a kind man.