Well, his version of me didn't see me, that would have seriously fucked up our plans. I don't think it would've, though. Time doesn't really work like that in our set of universes. It just spins off new branches, so there's not really any chance of a paradox.

[He pulls one hand from his mug to illustrate, veering it off in another direction.]

Just whatever you change starts a new branch, or changes the course of the one you're on. The one you came from stays pretty much the same.