There's no rule that says you can't was said by Marcus around 1999. The AML crew was playing Magic: The Gathering at Marcus' house, and he was losing, so he decided that he was going to shuffle his deck. Liam told him that he couldn't do that, and he responded with "THERE'S NO RULE THAT SAYS YOU CAN'T". To which Liam replied "THERE'S NO RULE THAT SAYS YOU CAN." From then on, they decided that every player was entitled to one shuffle per game.