Having gestured at the concept of rationality, I ought to stress that I intend nothing very grand or precise by that much abused term. When I speak of agents as having rational beliefs, I mean only that their beliefs (what they hold to be true) should be suitable beliefs for them to hold true in the circumstances in which they find themselves. A rational belief will thus be one that an agent has attained by some accredited process of reasoning.

Visions of Politics (2002) - Interpretation, rationality and truth