Basically, the dumber you are, the smarter you think you are and vice versa.

Doubt is the mark of actually learning

There's something almost liberating about this observation, even though it stings a bit. The people most confident in their answers are often the ones who haven't spent enough time with a problem to discover how many layers it has. They haven't yet hit the wall where expertise begins—that uncomfortable place where you realize how much you don't know.

This plays out constantly in real life. The coworker who's never done a project before often volunteers confidently for impossible timelines, while the seasoned expert hedges, lists complications, and asks clarifying questions. On social media, the people who've read one article about a complex topic will argue it ferociously with someone who's spent years studying it. There's an awkward inverse relationship between certainty and depth.

The non-obvious part? This means doubt can be a sign you're learning. That nagging feeling that you might be wrong, that things are more nuanced than you initially thought—that's actually the mark of someone moving from incompetence toward competence. It's uncomfortable, which is partly why people resist it. But the willingness to sit with uncertainty, to keep asking questions instead of cementing answers, is often what separates people who actually understand something from people who just think they do.