I had a friend in high school who used to do a magic trick where he would claim that he made your dick disappear. He used to do it all the time and find it amusing. He ipo'd his startup last year and made a lot of money.
he just declares that your dick is gone. its then on you if you want to prove him wrong
To prove the magic didn't work you'd have to show your dick to the whole classroom. The trick doesn't lie in whatever ritual was performed but in your presumed unwillingness to do what you had to do to prove it ineffective.
This is a brilliant anecdote to quote in the face of bad faith demands for evidence to disprove stupid claims.