Sklansky has stated in regards to a Negreanu article that he's only using Bayesian logic, whether he knows it or not. I certainly believe this to be true. Those poker players who "play the player and not the odds" are only assigning an (more?) accurate probability based on past and future plays.

For those who are uncertain about Bayesian logic:

Named for Thomas Bayes, an English clergyman and mathematician, Bayesian logic is a branch of logic applied to decision making and inferential statistics that deals with probability inference: using the knowledge of prior events to predict future events.

Rick.