Does that mean definitively that when the OED says something was first used, is that actually the first use date or is it more complicated than that?

It's definitely more complicated than that.

It's quite hard to honestly say with absolute certainty that this is the first date for something.

With a word that is coined for a particular reason, maybe it's an invention that's been given a name.

you've got more chance then because something brand new has occurred.

But even in those cases, if there was an earlier version of it, which was still given the same name but wasn't quite the same, you could still, you know, that could still be earlier.

It's based on the research and the scholarship that exists at any one time.

Yeah.