[c7b]

Ok, I'll take that. Still not sure about the argument under that definition, though. There are disciplines where 'talking nonsense with the intention to deceive' would objectively be a smart strategy, eg Poker. However, Poker should fall under the 'no-BS' fields according to OP (he lists sports, and expressly mentions chess there; any sort of trash-talking in any sport would also fall under that definition, and trash-talking athletes can still be successful - it's quite common in martial arts eg). My guess is that the OP would argue that Poker or martial arts still are 'no-BS' fields, we just need a better definition of BS.

But that just shows that the argument doesn't work with this definition, and the onus is still on the OP of providing a definition that works for his argument (or we have to conclude that his argument doesn't work).