New research suggests that knowledge can be a dangerous thing. Those most confident about a topic often claim to know facts which don’t exist.
For example, in one study, a group of experts claimed that they knew words like pre-rated stocks, more often than the “non-experts” did.
One reason for this might be that self-proclaimed experts are simply trying to look good and portray how much of an “expert” they are on the topic.
Even those who somewhat feel like an expert also change their attitude to the knowledge.
Atir, S., Rosenzweig, E., & Dunning, D. (2015). “When Knowledge Knows No Bounds: Self-Perceived Expertise Predicts Claims of Impossible Knowledge”, Psychological Science, 26 (8), 1295-1303