Interesting, but I have two follow ups
1. What are the implications of intentionally disregarding the existence of truth vs being blind to the concept? How does this distinction you made manifest?
2. Are you sure all humans actually believe in the concept of truth, or could it be the case that some people genuinely function on a principle "there is no truth, only power". Is it possible to think "truth" and "current dominant narrative" are one in the same?
I've certainly had a ton of luck with Bullshit in Diplomacy. As Russia, I offered a plan that involved France helping me take Munich and I would repay by supporting him against the English invasion. Did I intend to actually follow through, or was this a cunning lie? Neither. It was bullshit that got me into Munich. I myself didn't know because (in game) I don't believe in the concept of truth. Everything I say is true and none of it is true. Its all true in the sense that it might happen and I put some weight on it, none of it is true in the sense that there is no branch of the future game tree privileged as "the truth". Some truths have more weight than others, but there is no underlying absolute truth value that must exist yet I choose to ignore. Eventually the order box forces me to pick a truth out of the many I have told. But prior to being forced, it didn't exist.
Is it possible to think in this way all the time about everything? Maybe.