In fact, 99.999999% is an extremely low estimate. The number of ways that a deck of cards can be shuffled is 52! Which is equal to 8065817517094387857166063685640376697528950544088327782400000000000 possibilities.
If you shuffled cards every second from the birth of the universe until now, you still wouldn’t even come close (statistically) to getting the same arrangement twice.
cross-posted from: https://lemmy.world/post/42773245
Thanks to auto-capitalization, that factorial looks like the end of an exclamatory sentence with very unremarkable odds.