This is the simplest of the simple in method but a moment's thought followed by an actual tryout will show its effectiveness. Use two ordinary slates and a stacked deck. After a card effect using the deck if desired, state that you will prove beyond doubt that a card's identity can be transmitted by thought alone. Spread the deck face down on the table or floor. A spectator freely takes any card he wishes and allows no one to see it. He is told that if his selection is a picture or face card to return it and take another…