I could never figure out what No unauthorised entry" signs meant, as I thought unauthorised was una-thor-sized. I was about 19 years old before I heard someone read one of these signs out loud and realised my mistake.
And there was a magazine that we used to get that would say on the cover "full story on centre pages", I thought it said "certain" pages and would spend ages flicking through the mage looking for the certain pages that the story was on!
A childhood belief about reading

others believed things like this
- Having seen enough red octagonal STOP signs in my time, I used to look out for green circular GO signs.— Gary
- I thought the "To Let" signs on buildings meant they were public toilets.— Scottish Laddie
- Up until I was 17 I thought that 'no outlet' signs meant that the steet didn't have any streetlights.— Kelsey
- As a kid, I thought "No Outlet" signs meant the houses past that point didn't have any electrical outlets.— Julie
- When I was a kid, I used to believe that the "ped x-ing" signs meant "pediatrician crossing."— Jessica
- When I saw signs stating "Lots for sale" I thought it meant that there was a lot for sale.— Robin