 Constitution accounts pivot on the distinction between constitution and identity. Defenders of such accounts hold that constitution, unlike identity, is not an equivalence relation (Baker 2002). Constitution is said to be, at least, non-symmetrical. According to a constitution account, we say the following about the three types of puzzle cases described above. Cup is never identical with Tcup. Later Cup is constituted by Tcup [alternatively: Cup and Tcup never constitute each other, but later are constituted from the very same atoms]. Likewise the lump of clay is never identical with the statue, but earlier only constitutes the statue. Finally, the reassembly ship is never identical, but only constituted from exactly the same planks as, the original.