Permission City is grand. It made me realise just how silly the standard "are we living in a simulated reality?" questions are. Max Tegmark took these ideas fu

Permission City is grand. It made me realise just how silly the standard "are we living in a simulated reality?" questions are. Max Tegmark took these ideas further, and iirc cites Egan as partial inspiration for his type 4 multiverse. (I'm sure philosophers will groan and say that none of this is new, but it doesn't stop these from being incredibly fun and compelling ideas!)