I thought "prison" and "prism" are the same words as each other.
A childhood belief about speaking

others believed things like this
- I used to believe when a person was convicted of a crime and sent to prison, his lawyer went to prison, too.— Tara
- my uncle got sent to prison on the Isle of Wight. I thought that he had been sent into exile.— nns
- I thought the women in Prisoner Cell Block H were actresses banged up in prison themselves.— Reb Kean
- I used to think a con artist was someone who painted pictures in prison.— Brandon Campbell
- all people who smoke roll up cigarettes have been to prison— spam
- I Used To Believe That Jail & Prison Are Both Timeouts For Adults/Grownups— Kelly Bulanek