*A reader's on-ramp for the Integration Era*

You've seen the three words used as if they mean the same thing. You've also seen someone get corrected about it, firmly, in a comment thread. Somewhere between those two experiences is a real distinction worth ninety seconds of your time — and a lot of fake precision that isn't worth any of it.

Here's the honest version: the terms overlap, the boundaries are argued over by people who care a great deal, and you can enjoy all of it without sorting any of it. But the distinction is genuinely useful when you're searching for your next book or trying to recommend one, so here it is, cleanly.