Rationality does indeed seem to be a rather more internalist notion than knowledge. Nozick deals briefly with a challenge to the whole notion of rationality: perhaps rationality as such is biased by being 'class-based or male or Western'. He proposes to cover and contribute to two main areas: rationality of decision and of belief and offers a new proposal for decision theory which emerges in part from a discussion of two by now traditional problems Newcomb's Problem and the Prisoner's Dilemma. Nozick has three discussions of Newcomb's Problem, in The Normative Theory of Individual Choice, Socratic Puzzles and The Nature of Rationality. In The Nature of Rationality, accepts from Gibbard and Harper that the conflict was between causal and evidential expected utility, not between expected utility and dominance, which nozick treats as two components of 'decision-value'. Rationality for Nozick goes beyond the instrumental to include pursuing evidential and symbolic utility, but only limited progress goals are rational.