Lanefan
Victoria Rules
Selective amnesia is exactly how it works.How do you reconcile that with your stance that xp=memories? That spell would cause permanent amnesia of everything that happened from the moment the PC began training for his original class to the moment the Renouncement spell is cast on him.
Maybe. There's nothing preventing such.Then presumably, because he can't remember why he wanted to change classes, he'd start learning his old class again!
That said, the amnesia is of what you did in and as the class and what you had learned through doing so. The memories of why you wanted to do something else, or the change in ethics that led to the desire to change career*, remain.
* - the most common reason for seeking a Renouncement is a forced alignment change that either outright prevents you from being your old class or makes that class (and-or the adventuring lifestyle as a whole) no longer palatable. The second most common reason is an unforced alignment change, i.e. the character has rethought life on its own and wants to go a new direction.