 Much the same can be said for Tib and Tibbles. Tib and Tibbles are both long-lasting four-dimensional objects, according to perdurantists. Before the accident, at any given moment a temporal part of Tib is a spatial part of a temporal part of Tibbles. After the accident, Tib and Tibbles share temporal parts. But there’s no mystery as to how Tib and Tibbles can coincide after the accident yet still be different things: neither the whole Tib nor the whole Tibbles is there, just some of their shared temporal parts.