If every trace of any single religion were wiped out and nothing were passed on, it would never be created exactly that way again. There might be some other nonsense in its place, but not that exact nonsense. If all of science were wiped out, it would still be true and someone would find a way to figure it all out again.

It has been featured in dozens of television shows and articles and was designed by his friend Colin Summers. From a FAQ from Penn & Teller's official website there are three common answers:
It means he once shot a man for asking personal questions. Drell

Babylon 5
"Day of the Dead" (1998) TV episode.

Penn Fraser Jillette (born March 5 1955) is an American illusionist comedian musician and best-selling author known for his work with fellow magician Teller in the team Penn & Teller.