Many people go around with very little shame. To them, really knowing is not as important as making people think they know. They are lazy too. Why do all the work to become truly informed when you can do very well by pretending. The other side of the coin is that most people are uncomfortable with calling someone out when they are wrong. They often just end up looking contentious and picky themselves. So the outspoken, B.S.'ers are free to rise to the top of the social and economic food chain. Similarly, we get into trouble when we elect political leaders who we think are "intelligent" based on academic pedigree. Then we realize that real world street smarts can be just as, if not more important.