What are your best examples of people exhibiting the Dunning Kruger effect?

Which is when people are too ignorant to understand why they're wrong.

I fix boats for a living, and I can tell you there's probably no subject in existence

where everyone knows better than you than boats and boating.

To quote someone on a repair, no, that's way too much for the work here.

Tell them their deck is rotten from years of water seeping in? No, you're wrong. I take very good

care of my boat. It's actually crazy. I called for a service on my AC. The guy comes out,

says everything was fine and it was working in that moment, so I pay the fee, and he leaves.

Three weeks later, the unit fails, and I call another company to have a look.

I was giving the story to the tech, and I said something like,

The other guy tested everything, but that doesn't mean a component didn't fail after he left and before you showed up.

And this guy was startled.

He told me very few people understand that can and does in fact happen.

Well, I work in IT and have had to have this discussion many times with people.

When I was in high school in the 70s, I thought that I was a good singer.

I sang in a couple of bands.

Later I built a recording studio and worked with bands, learning more

and more about music. The more I learned, the less good I believed I was, but I kept practicing

for years. A few years ago, I took vocal lessons from an excellent teacher. I believed I was

close to being a good singer and just needed some minor tweaks, and he showed me how far away

the goalpost really was. Looking back to high school, I sucked while believing I sounded good.

My dad thinks he's the man at day trading and the real estate market because he once managed to

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