[rms]

This line of thinking happens in high level rock paper scissors. You need to predict exactly how many levels deep your opponent is going. Professional RPS players will often throw six or seven doubles in a row before someone wins.

See this 200 page guide for more info than you will ever want to read: http://www.scribd.com/doc/924991/The-Official-Rock-Paper-Sci...

[euccastro]

emfle is making a more straightforward point: if you anticipate your opponent will try to beat his latest move, you should not try to beat his latest move too; that would be shooting for a draw.