John shrugs and nods, and picks up Alice to hold him around his chest so the bird can stop anxiously hopping around his feet. It would be a stupid thing to argue about, so he's letting the conversation drop, as weirdly strong as he apparently feels about it. Maybe all of Rose's weird babble about Relevancy and Truth and stuff really stuck with him more than he realised for barely following it.

"OK well I will have to remember that so that I won't get freaked out if I find an egg and it explodes!" He lifts Alice slightly up and forward to indicate him to Carly, as he remembers the second half of his manners. "This is Alice, by the way, he's the only Pokemon I have right now."