 The main argument is blunt but clear, and plausible enough. What the new city really does not want is the presentation of base types, because acting such parts fosters the behaviors that are found in the persons being mimicked (395c–397e). Attempts to read this impersonation as attention to appearance alone (Lear 2011) have the advantage of unifying Book 3 with Book 10, but sacrifice the psychological simplicity behind the argument.