It doesn't. That he wants to say it does, that he means what he's saying does, and K can see that he does: he looks for them and every single marker is there, and not a single trace of dishonesty. K knows how to look under a person's skin, find the pieces of them they're trying to hide - replicants, yes, that was what it was built for, he was meant to find the barcode printed under a subject's eye if it was there to find in their mannerisms, their delays, all the ways that they were close to and yet not quite human. But he learned more than that too.

His original cigarette is out. He picks up the pack off the table in front of him, pulls another out, lights it and draws on it in silence. He has no idea what to say, no idea what to explain, so he doesn't.

He just doesn't.