expression
it's probably so; it stands to reason
A somewhat literary or formal expression used to acknowledge that something is likely or reasonable. Often used in commentary or reflective statements.
彼が怒るのもさもありなん、あんなことを言われたら誰でも腹が立つ。
It's only natural that he got angry; anyone would be upset after being told something like that.
この結果はさもありなんという感じだ。
This outcome seems quite plausible.