The first one -- Ford doesn't need to say fair enough for it to come across. He really hasn't considered the possibility that he himself might be compromised and use the knife for unnecessary destruction. So, yes, he'll rework the design. No arguments.

No arguments against not cutting the Barge. Surprise, yes, at the idea that the ship is alive, but not as much as there could be. It's not an "oh, my god, it's alive!" It's just an "Oh."

Three, though, makes Ford frown. He knows who his mind jumps to, and shutters immediately close behind his eyes. It takes a second to open them again. "So, you know about that. Listen, I can't keep him out when I'm recovering in the infirmary. It doesn't have an access filter and it isn't warded against him. ...I should probably look into that," Ford adds as an afterthought. Not a bad idea, honestly, given how often he's wound up there. He's taking this entirely literally and assuming Dillon means how Bill never stays out of his dreams when Ford is death tolling outside his cabin, because of course it isn't figurative, why would it be?