Some people are very good at working with complex abstract ideas, but are terrible at signaling that intelligence to others. And some are fantastic at signaling intelligence and steering conversation toward domains of knowledge that they've studied (many political commentators come to mind), but don't seem to have processed those ideas very deeply.
It seems that way sometimes but maybe we're just biased as we tend to hang out among intelligentsia
Oh we can call that the 4th problem. The bias of the people perceiving the bias