"Another program tells the machine whether to let you win ,
depending on how you play the hand. Of course, you can't be allow to win
every hand-even if you make the right choices."
I was not aware that a separate program determines whether or not you win depending on how you play the hand. Is this correct? So a casino could have a full pay VP machine, but have this separate program set to not allow you to win depending on how you play the hand?