iOS App:Forensic Identification Assistan

"This app is intended for entertainment purposes only and does not provide true finger print locating technology functionality." THE most amazing piece of finger print locating technology ever created (or so it will seem) Your spectator selects a card, signs it (signing optional) and returns it to the deck. The cards are cut in to 4-5 piles and the piles are mixed by your spectator. The FIA app is launched and your spectators fingerprint is logged in. The app now scans every pile and not only identifies which pile contains the selected card but also at what position in that pile it is located! Ok so how does this miracle actually happen?? Well as you can guess the app does not find the card but the clever design and programming allows it to appear that way.