This was rhetorical. My point was that a system or model which cares about something other than the truth can, upon reaching a certain level of sophistication, be able to handle reasoning about truth. Eg, an AI that cares entirely about approval for what it says rather than the actuality of what it says could still end up reasoning about truth, given that truth is most heavily correlated with approval. I reject the premise that there has to be an a priori truth model under the hood.