You could be harboring a false, preconceived notion or a fallacy that's so deeply engrained into the fiber of your being that you believe it to be fact/truth and never even realize it
- French fries aren't from France.
- Napoleon wasn't short.
- Peanuts aren't nuts.
- The color red doesn't make bulls mad.
- Your hair and fingernails do not continue growing after you die.
"Beam me up, Scotty"
"Just the facts, ma'am"
"It's elementary, my dear Watson"
"Luke, I am your father"
"Play it again, Sam"
"We don't need no stinkin' badges!" are actually mis-quotes and were never used in any series or movie..
But seriously, you make a good point