 Most seem to have accepted Lewis’s view (see, e.g., Akiba 2000, Hawthorne 2003, Noonan 2007, Noonan and Curtis 2018), but there are some who dissent (Gallois 2005, Shumener 2020, Azzano and Carrara 2021). The question of how and why we use the concept of identity was a central concern of Wittgenstein (see Fogelin 1983 for an overview), and has recently received attention from others (Burgess 2018).