my former colleague, david neilsen, used to belive that there was a nomadic dwelling - perhaps like a yurt - called a "purpose". he inferred this from a figure of speach which he took to mean "what i'm about to say is so obvious it's known by all nomads". the idiom in question was "to all in tents and purposes...."
A childhood belief about speaking

others believed things like this
- Anytime you had a question (any question at all) you just called the president.— Erin
- I thought that since my grandpa and my dad's names are both David, than David Bowie must be my aunt's son.Anon
- Since we receive bread at Mass, I thought he was called "Jesus Crust" Seemed pretty obvious!Anon
- I used to belive that hamburgers were infact called "handburgers" because you ate them out of your hand :DAnon
- I thought sadism involved being sad and depressed. Obvious, I think.— ]_]
- I believed that everytime I kissed my David Cassidy poster he'd feel it back home in Hollywood.— Marie M