Dunno…it wasn’t exactly a rule zero moment (as I understand it). It was just organic social interplay between actual humans at the table struggling with the ethics of their decisions. 

Sometimes I fear, a little, that social conflict mechanisms can short-circuit the introspection and turn the conflict into swordplay by other means. Like, it’s a struggle to remember what was actually said sometimes during a Duel of Wits, because we’re so busy finagling and strategizing our plays that we don’t really internalize what’s being said. We say it because it’s expedient and it fits our tactically optimal move, not because our character actually believes it.

Which may be entirely purposeful if I know luke crane at all. It’s a pretty cynical view on human communication but entirely plausible as well (especially if one or both sides have already decided that They Must Win and damn the ethics).