Just discovered the Dunning–Kruger effect. A cognitive bias identified by psychologists David Dunning and Justin Kruger back in 1999, it explains how people who don’t know much about something often think they know a lot, while the people who do know a lot tend to assume they don’t know enough.
Naturally, I’ve experienced this—on both ends of the spectrum—many times. I even mentioned this here one year ago. Just didn’t realize there was a scientific name for it…