Empiricist: Your problem is over-reliance on logic when we need to rely on data and evidence. You need less ἔστιν τε καὶ ὡς οὐκ ἔστι μὴ εἶναι and more things you can just point at.
Parmenides: Very well, then. How about you start by pointing at exactly what changes?”
E: That bird there: he just flew from that oak to that elm.
P: Just so we’re clear, you’re not claiming that oaks became elms, or what we once called being-on-oaks became what we now call being-on-elms
E: Right. It’s the bird that changed.
P: So it’s not a bird any more?
E: No, it’s still the same bird.
P: So now you’re saying the bird stayed the same. I wanted you to tell me what changed.
E: Well, the bird changed in one sense and not in another.
P: So now you want to divide senses of a bird? And you’re saying I’m the one who is appealing to abstractions? I thought you were the one who just pointed to what was real. Where is this “sense of the bird” that changes?
E: It’s easy! It’s the property of being on oaks!
P: That’s literally the first thing you said didn’t change. Have you started thinking that contraries become one another now?
E: No. Contraries don’t become each other at the same time.
P: Ah, so it’s contrary times that change?
E: No. The thing at one time, say 6:00PM, becomes its contrary at another time, say 6:01PM.
P: And what thing is that, exactly? That just what I wanted you to point to! But as for your time example, it’s clearly just another property of something. You can’t say the property of “being at six o’clock” becomes “being at 6:01.” So what thing changes exactly?
E: THAT THING RIGHT THERE!
P: Excellent! Demonstrative pronouns! What exactly does your “that” refer to when you’ve admitted it isn’t the bird, the property, or the time?