“If you think you know a lot about something, even though you don’t, you’re less likely to be curious enough to explore the topic further, and will fail to learn how little you know,” says one of the team members behind the new study, Louis Marti from the University of California, Berkeley.
In addition “the more sure we become that our current position is right, the less likely we are to take into account other opinions or even cold, hard scientific data”.