I used to believe that "perhaps" was only used when you were tired of saying "maybe", instead of just being an alternative word, and I asked people who said it if they were tired of saying "maybe". I had a children's dictionary that explained that they meant the same thing by saying "'Perhaps' is a word you use when you are tired of saying 'maybe'".
A childhood belief about speaking

others believed things like this
- I used to believe that being wasted meant feeling really tired. Anon
- I used to believe that snow on the ground was clouds that were too tired to fly.— alex
- In first grade, I thought that if I've never heard of a word before, then it wasn't a word.— Destiny
- my husband believed, until recently, that the word "several" meant seven of something. — sheryl
- I used to think the word fever was just another word for giraff— Marshall m
- I used to believe that "nuptial" was a naughty word. I thought it meant nipple. XD— Sara Hagen