That's a rather defeatist attitude to have about explaining technology to laymen. For example (not saying this is how it actually works): "Scanning your phone

That's a rather defeatist attitude to have about explaining technology to laymen. For example (not saying this is how it actually works): "Scanning your phone when you enter lets us know who you are. Then, our advanced vision tracking system follows you around the store and lets us see what you're choosing. Finally, scanners in our turnstiles verify your purchases as you're leaving the store."