...that's an awfully random thing to think.

And this was a point I was hoping someone else would bring up earlier, but no one has, so I suppose I'll throw my two cents in.

Someone mentioned earlier that Seymour could use X's tactic of learning Sigma's patterns and then forming a strategy around them. Sen, your counter argument was that the only reason Sigma uses a pattern in the games is so we can beat him, and I don't think that's entirely true. Sigma is an artificial intelligence, a highly sophisticated one, but nothing more than zeros and ones at his basest level. He's also extremely calculating and intelligent.

With those apsects of his personality in mind, it's hard to see how Sigma could not act within some sort of pattern. He shows his weak point periodically, and there has to be a reason for that. Maybe he needs to expose his weaknesses in order to cool down his circuitry, or to recharge certain parts of his body. Either way, there must be a reasonable explanation for it, otherwise, why would he expose his weak points at all?

The way I see it is like this: Sigma absolutely must expose his weaknesses in order to attack, or to use certain attacks. Keeping his calculating nature in mind, one would have to assume that he has constructed the most advantageous way of exposing the chinks in his armor and recieving the benefits of doing so while taking minimal risk. That immediately implies that he must be using a pattern of some kind. Otherwise, if his attacks and strategy are all reactionary and improvised, he could find himself dangerously in a position where he had no choice but to expose his weaknesses for a possibly prolonged period of time or at a moment when his opponent was ready to fire off his most powerful attack.

With that said, I can't see any way that Sigma could not attack using some kind of pattern. It could be a very long pattern, and take a long time to go through an entire revolution, but eventually he would have to come full circle. That is where Seymour's advantage lies.