If you look around a bit, you'll find the next path down in the rabbit hole: "What do we mean by 'identity'?" Then, you'll find yourself "What does it mean 'to be'?" After a while, you find yourself grasping at logical straws, trying to find a way to formalize the binary function '=' and the concept of "object" or "existence."

And then you realize just how deep the rabbit hole goes. Then you either sit around with a beer watching the footy, or you lose yourself in a fever of implementing new games, or, if you really and deeply care about the issue, stuff a 13½ in your hat, and sit down to think over some tea.