He almost says sure, course he can without thinking, but ... this is too important. So he takes a moment, and thinks about it, really thinks, before saying anything.

"Seems like either it'd be impossible," he says slowly, "or it'd be dead easy. Cause if it can change, all it'd take is knowing it was gonna happen to put him on a different plane, like you said. Or don't send up that plane at all, or tell em to go a different way, and then it won't happen. So maybe he can."