I'd amend this to say "A PROPERLY shuffled deck of cards is unique in all human history".

Without proper shuffling, a card deck is like an encryption key with a poor initialization vector -- it's more predictable.

Card decks ship in order, and playing solitaire will potentially put it back in order. Many people don't shuffle properly, so I would hypothesize that the actual set of decks that most people run into are less random.