Things that are accepted as facts that aren't true

Cold weather causes the flu.

Balderdash. The flu is caused by viruses, which is why you can catch it during the summer. And you cannot catch a flu in Antarctica because it's too cold for the virus to thrive and spread there.

This is a great website filled with funny, creative, mature and intelligent posters.

"The Great Wall of China is visible from space.
On average people shallow 8 spiders a year in their sleep."

Those aren't generally accepted as facts (though they may have been in the past). The first one might not even be a misconception, because the starting point of "space" is generally considered to be 62 miles up, i.e., at the Kármán Line, which is about the point at which the air becomes too thin to provide enough lift for a conventional aircraft to maintain flight.

This paper - https://www.tandfonline.com/doi/pdf/10.1080/10824000609480619 - says:

This demonstrates that the Great Wall of China can theoretically be seen at the altitude up to about 500 km. Considering that most manned spacecrafts are orbiting the Earth at a lower altitude of 160-320km, it is logical to state that astronauts can see the Great Wall of China under ideal environment conditions.

Fake fact: We humans only use 10% of our brains --> Reality: we actually use the whole thing.

Fake fact: If you sneeze with your eyes open, they'll pop out and roll out on the floor --> Reality: they wouldn't, because your eyes are securely attached to your skull via the optic nerves, tendons, and muscles. The Mythbusters proved this.

Fake fact: hanging bags of water around will keep houseflies away --> Reality: they don't do anything to stop flies from buzzing around (Mythbusters proved this too).

Fake fact: opening the windows in your house will make your home less vulnerable to the suction of tornadoes --> Reality: first off, stopping to open the windows in your home will delay precious minutes you could be using to go somewhere safe in your house. Second, opening the windows will make it so debris can fly into the house and cause unnecessary damage. Third, if the twister's gonna pass over your house anyway, opening the windows won't make any difference. The house is a goner regardless of whether the windows are open or closed.

The Great Wall of China is only visible from space if you're flying directly over it in high orbit and looking down.

"The definition of insanity is doing the same thing over and over and expecting different results."

There is no evidence that Albert Einstein ever said this, and even if he did, AFAIK there isn't a psychologist, psychiatrist, or textbook which would concur.

Yet to this day I occasionally hear people say this and attribute it to Einstein.

I still cringe when old TV series blame colds on someone sitting in a draft. 🤦🏻‍♀️

Bulls get angry when they see the color red.

I hate gay people.

Never have I said I hate gay people. Like many, I'm repulsed by it, but not the people. I have ONLY, and will ALWAYS say, " do what ever you like, in your private moments, like we all do, just don't be shoving it on everyone". This will never change.

I also can not stand the flavor of green beans, and don't want to partake or be around them. And yet, I do not "HATE" green beans.