What is it that makes an object the thing that it is? Is it some kind of substance onto which properties are predicated? Can two (or more) things colocalize (there exists in a single region of spacetime both a thing I call my hand and a thing I call my fist)? In what follows, I am going to riff on some ideas I have for a theory of thingness.
The colloquial way of defining what it means for a statement to be true is that it corresponds to reality: if I say “it is raining” and it’s also the case that it’s raining, then what I said is true; if I say “it is raining” and it’s not the case that it’s raining, then what I said is false. This is an extensional truth condition – the extension of the proposition must be the case in reality for the statement to be true. But is this really how truth works? In what follows, I am riffing on some ideas floating around in my head, so feel free to point out any problems so as to help me clarify my thoughts.