officially "dunning-krueger syndrome" i guess, yeh

It is the converse of Dunning-Kroger. The more you learn and know about a topic, the more there is that you realize you have yet to learn. So the dumber you are the smarter you think you are. The smarter and more educated you are the more you know about your limitations. A D-K victim will never say ‘I don’t know” or “I was wrong”. A brilliant person like Feynman will often admit that he doesn’t know what he doesn’t know and that what he knew yesterday has changed. It’s one primary difference between religion and science. And, of course between narcissism and genius.

I always found quantum mechanics to be vey interesting but find it hard to think it in relation to religion.

I don't know about other subjects but it certainly applies to quantum mechanics. I'm not sure if the cat is both dead and alive at the same time. It might be only dreaming. If this last one is it, the cat may imagine that it can fly.

Not sure about generalizing that to everything. However, it certainly doesn't bode well for absolute truths, passed down thousands of years ago, which can't be revised.

True. A clerk was ranting at a store yesterday that this virus was deliberately started by China and I quote "Nothing anybody says will ever make me believe any different".
The ignorance hurts.

He was so right and still is. We stil don't understand entanglement, the duality of light, how things can only be measured by degrees of probability. But to your point about religion and politics - unless you listen to and fully respect the entire spectrum of possibilities in these subjects, you can't fully understand them, and thus should not so fervently believe in one side of that spectrum. Now, in OUR case, we've done that with religion. We've examined that spectrum as far as we can to date (I have anyway). We're only agnostic because we don't know what created the universe.

Very interesting statement

Sadly I think the more you think you know, the more you dismiss the point of view of others.

You don't know what you don't know and you don't know that you don't know it.

One last quote:
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.” ~ Stephen Hawking ~

Check out JEB Haldane's line: The universe is queerer than you can imagine. It is queerer than you are capable of imagining.

... and if I say I understand what you're saying, completely?

Comprehension is not necessarily based in fact or truth!!!

Understanding is not based solely on faith or truth!!!

Knowledge without application is arguably not really knowledge until tested against reality. That is the ultimate failing of religious thought; it plays the game of using the unknowable to excuse the unprovable.

I would add that uncertainty is a good manipulating tool.

He was paraphrasing (plagiarizing?) the Tao Te Ching.

sounds cute, but just because you say it doesn't make it true. The "something" makes all the difference.
I fervently believe I understand addition of whole, real numbers. I am pretty sure I do understand it.

Negative - I know nothing, I am a meat popsicle.

Excellent!
There is another doctrine, which I call the "Feynman was a Source of Brilliant Quotes" doctrine:
Everything that living things do can be understood in terms of the jigglings and wigglings of atoms."
This quote showed up in an article in an old "Scientific American" that just came my way, today.

So by this reasoning, there is no such thing as an expert. As an expert supposedly has more knowledge and expertise in a subject area. But if the speak intelligently on this subject, they are apt to be accused of the Dunning-Kruger effect. When does an expert become an expert and not thought one of your typical blowhards? I like Novelty's answer.

Dale?

I've no problem realising I don't understand quantum mechanics. I do understand that religion and philosophy, being similar in nature, keep opening up new ways to understand what might be reality so it's a never-ending journey. I don't mean, though, religions that think the journey, in terms of truth, is over and the rest is just waiting for their truth to come to pass.

You mean, 'If you think you understand 'god', (or the lack thereof), you do not understand it?'