what's what

Noun

idiomatic uncountable

(idiomatic) Precisely what the situation really is or what the facts truly are; the true state of things.

Japanese Meaning

状況の実態 / 物事の真相 / 実情そのもの

After reviewing the reports, she finally understood what's what.

報告書を見直した後、彼女はついに状況の実態を理解した。

Sense（1）

(idiomatic) Precisely what the situation really is or what the facts truly are; the true state of things.

Besides, he had some qualities which fix

Middle-aged ladies even more than young:

The former know what's what; while new-fledged chicks

Know little more of Love than what is sung

In rhymes . . .