A lot of it has to do with the culture of shame that causes us to posture in the first place. We bullshit because we're afraid of what the other person's reaction will be like.

I feel fortunate to work for a company that has a zero-tolerance policy for shaming others and their code knowledge. In fact, it's much more common to hear something like "I'm not familiar with that - could you teach me?" instead. Weekly, we show off new tools or techniques we've discovered so the chances of being left in the dark are slimmer. It leads to a lot more open discussions and a better overall base of knowledge across the entire company.