stubbornbelief
nounUK /ˈstʌbən bɪˈliːf/
US /ˈstʌbərn bɪˈliːf/
A stubborn belief is a belief you hold tightly and refuse to change, even when others show you it might be wrong.
His stubborn belief that he could fly kept him jumping off the shed despite all the bruises.
OTHER MEANINGS
2. A belief held firmly despite strong evidence against it.
Her stubborn belief in the lucky coin made her ignore every losing streak.
3. An opinion someone clings to out of habit rather than reason.
Grandpa's stubborn belief that phones cause rain is just a family joke now.
4. A conviction that resists persuasion or new information.
The team's stubborn belief in their old playbook cost them the game.