Yes the cards are perfectly symmetical, and he used a set 4s while i was inspecting the 2s that he used before and no marks or bends of anykind and he still got the trick when he used the fours, also he just guess or says you didnt move a card when you dont move one, and he is the only one in the room who knows how to do the trick.
but again it is like taking 4 piece of blank paper and turning 1 180 degrees and being able to tell which one it is.
no matter what we do to the cards he can still tell.
and i have turned it 360, he cant tell cause it is pretty much doing nothing, i have turned all four and he can still tell.
we have even choosen which cards to use from the deck, pulled themout, set them up and turn them when he is not looking, and he can still tell.
so i dont think he is setting it up cause we set it up and he still go it.
i mean if he guesses when you dont move a card then it has to do something with the card itself and not the surroundings right?