[Holy shit. Dean might have a son. No wonder seeing Lisa had thrown his inmate.]

But in theory, other you might believe that Ben's his son. [That is...so far out of his realm of expertise he's not even sure he's on the same Barge anymore. And there hadn't been a thing about Lisa or Ben in Dean's file. He'd know, since he basically has it memorized by now. He chews his thumbnail.]

Or something else happened in his universe that didn't in yours. [Or hasn't yet, anyway.]

Or both.