With your leave, I'd like to start a thread on philosophical videos. The objective is to post a video that caught your eye, got you thinking, made you wonder, resonated with your worldview, caused you to go "Eureka!"

You may also add a comment with the vidoe, maybe an anecdote, an explanation, an insight, a summary mentioning salient points.

If you want to discuss the topic covered by the videos please start a separate thread and discuss it there. I want to, fingers crossed, devote this thread to videos only. Thank you.

I'll go first.

The Dunning-Kruger Effect.

The Dunning–Kruger effect is a hypothetical cognitive bias stating that people with low ability at a task overestimate their own ability, and that people with high ability at a task underestimate their own ability. — Wikipedia

Anecdote

A person I knew a few thousand years ago related to me his educational experience. In high school he recalled his biology textbook - all human biology - each system in the body covered in about 10-12 pages. The chapter on the eye was easy peasy. It was simple.

Then he went to medical school and it got tougher. The chapter on the eye became a whole book, intricate details of which he had to commit to memory. It wasn't that simple.

He decided to become an ophthalmologist and although, from his past experience, he had prepared for the worst his jaws hit the floor when he was informed he had to read a 2 volume book, each at least a 1000 pages, on just the retina. It was mind-bogglingly complex, the eye.

Please continue.

P. S. Please don't post the videos addressed to me. Thanks.