finally · in the end · when all is said and done · after all · to the end · to the last

What is the ultimate purpose of education?

I wonder where he is hiding.

Sometimes I wonder about the meaning of translating sentences that even native speakers don’t fully understand. It's clear they are sentences copied from some book; what is their true significance?

Don't argue with an idiot, or else people might not be sure which of you is really the idiot.

What on earth are you talking about?