[He shakes his head.]

I don't have any. It's the only other way I can think that's infallible.

[A beat-- and he adds:]

Would you do this to me? If this were me and not him? Only I-- we don't know anything about what happened, about that night. About why he gave it up. We-- James, god, I love him too, Sirius, you know I do, but we can't just turn on Peter like this-- or why wouldn't he betray us, if we were so faithless to him?