A deck that no-one has any information on can be considered shuffled...

... if it was shuffled before and not manipulated since (mulligan, scry etc.). Agree or disagree?

It's more of a joke debate, but when fetching a land, I like to take a stack of cards from my deck and if I see the land I like on the bottom of that stack I pull it from there with the stack facing down. Then I put the rest of the stack back on my deck.

I pose that the deck is now still shuffled. Since no-one knows the position of any cards, just as before. My friends mostly disagree and then I shuffle anyway. :-(