Alice: I just bought a shelf from Ikea.

Bob: Strictly speaking, you bought the matter of a shelf from Ikea.

Alice: Well, that’s the thing that matters, isn’t it? 😛

Bob: Not really, since it’s the form that makes the matter a shelf.

Alice: That’s a different matter entirely, I was just —

Bob: Not so, it would be the same matter, just with a different form.

Alice: I was trying to say that there’s no disagreement of any substance here.

Bob: Agreed. For there to be a disagreement regarding substance, one of us would need to think the shelf had a substantial form.

Alice: No, I had something much simpler in mind.

Bob: Come now, you can’t seriously be considering whether the shelf is simple? It is evident that it must be a form-matter composite.

Alice: My point is that we’re talking in different categories.

Bob: Well, I wasn’t really thinking about the categories at all.

Alice: Yes, that was evident.