[There it is. That's more of the argument Bruce had been looking for. He knew Tony was suppressing something, and it was never going to be resolved if he kept it pushed down. Bruce had had that little fact of life thrown in his face over and over until he'd finally learned the lesson, himself-- that you'll never feel differently about something if you always keep it hidden.

So he did somewhat want an argument, because he can handle it, and he's not afraid of Tony or of the consequences. He's relatively certain that, however he feels about the Hulk, Tony won't provoke him into changing, and this isn't so personal a topic that Bruce thinks he'd lose control just from discussing it.

Although it is, still, pretty personal. To him, too. He'd known if not explicitly, then at least had managed to piece together, that the Hulk had saved Tony's life-- hearing it out loud is a nice confirmation. But the cloning upsets him, and he gets why this isn't easy to accept.]

That's how cloning works. And I have some theories about how it works here. But the original's not there, [Bruce says bluntly, standing in front of him and forcing him to meet his eyes directly. He uses what is major, significant information almost as a weapon, throwing it out.] We're clones, but the original isn't back there, living our lives. It's just us. Here.

[The previous Tony Stark is probably a dead clone body resting somewhere beneath the turtle shell, wherever their cloning facilities are now. With the tanks screwed in like light bulbs, as Costigan had said. Part of him is still mourning for him, because although he does think that this is more or less the same person in front of him now, this Tony is right-- he's not exactly the same. And there's probably a corpse somewhere that used to be his friend, and it makes Bruce more combative on this subject than he would be otherwise.]