Sure, that's an okay way to go about it. ^_^ Since I'm doing the Penknife core library stuff from the top down right now, I'm just writing things the way I want to write them, trying to determine what axioms I need before the core library is loaded. If the high-level axioms are defined in another lower-level library, that's just fine, but I don't know why I'd bother with that when I can just put them in the Arc part of the core. :-p