Yes, it is not a "truly random" system, as the person can control how the dice land.baccarat said:the dice have no memory which is very true. But what do you think about players? Some players seem to get cold and stay cold. Some players seem to have the natural ability to throw. And some I noticed just suck. The one thing about craps is that the player influences the dice. How do you think this fact works with your statement?
The problem is that if you watched these players for months, for tens of thousands or hundreds of thousands of dice rolls, you'll realize that they the values of the dice they throw will average out to what's expected. And watching players for only a few minutes / hours at a time at a craps table isn't enough to know if they are getting some numbers more consistently than other numbers, even if they hold the dice the exact same way every time.
From http://en.wikipedia.org/wiki/Statistical_randomness:
A sequence exhibiting a pattern is not thereby proved not statistically random. According to principles of Ramsey theory, sufficiently large objects must necessarily contain a given structure ("complete disorder is impossible").
So no matter what, "random patterns" will inevitably emerge. The idea that you can predict the future dice rolls from these patterns is what's erroneous.