I used to believe when you'd see a company sign that says "Est. 1928” it meant they estimated the company was founded in 1928. I always wondered why some companies had to estimate when they were only a few years old. Much later I realized est stands for "established" and not "estimated".
A childhood belief about reading

others believed things like this
- I thought that the insurance company Aflac was owned by Ben AffleckAnon
- I used to think that a company had boats all over the world making waves, and airplanes making cloudsAnon
- I thought for the longest time that a No Standing traffic sign meant no person should stand near that sign.— Shannon
- I thought that the sign "!" meant: "look at the wonderful landscape"— Giorgos
- my mom believed when she was little that a street sign that said don't walk meant you better run.— Sara Mclen
- I used to believe a dead end sign meant there was a graveyard at the end of the street or zombies — Still Out There