What was the dumbest belief you had when you were a child ?
Some examples from my personal experience:
-When I was little, I believed that researchers were really fighting each other when I heard "researchers are fighting to find a cure for this disease".
-I thought an autopilot actually worked like in the movie "Airplane", that it was really an inflatable dummy.
When i was a child, i thought that high voltage lines were for little people travelling in cable cars.