[AndrewC]

A closer analogy might be playing the slot machines, but every time BAR comes up, it stays in the window and only the non-BAR drums roll. Eventually, you can be assured of making all BARS.

Better check your analogy Junior, casinos rely on some probabilities to stay in business. When you roll a pair of dice, one of them stops before the other.

[Junior]

That's why I specifically said that BAR stays put rather than rolling again. I was trying to point out that evolution never starts from scratch.

[gore3000]

When you roll a pair of dice, one of them stops before the other.

Yes indeed. The laws of probability have a brilliant proof. It is called Las Vegas - a city of fantastic hotels built with the money of those who believed that the laws of probabiltiy did not apply to them.