A deceptive software demonstration downplaying the slowness or difficulty of actual operation with phrases like "isn't this great?" "You can do this!" "Almost realtime rendering!"
The seller uses oleaginous phrases and a kidstuff demonstration, leading the victim to falsely believe that the same stupendous calculation speed occurs with an elaborate detailed model of a hospital or the complex spreadsheet of an international corporation.
"Dang! They got me believing that my hotel project would render as fast as their little 3D house model. What a lie! I'm a fool! It was an Introsuction!"