alanback: Lol. Yup. That's why I specified an infinite series. ;-)

If you like we can bring statistical significance into the mix. That'll allow us to talk about finite series. Not iron-clad as guarantees go but good enough.

What I'm waiting to hear is how these machines are programmed to effect whatever guarantees redsales is talking about. What are they deciding on? How do they know when the randomness so far isn't good enough? When is it time to increase or decrease the percentages?