Individual beliefs, intentions, doubts and desires owe their identities in part to their position in a large network of further attitudes: the character of a given belief depends on endless other beliefs; beliefs have the role they do because of their relations to desires and intentions and perceptions. These relations between the attitudes are essentially logical: the content of an attitude cannot be divorced from what it entails and what is entailed by it. This places a normative constraint on the correct attribution of attitudes: since an attitude is in part identified by its logical relations, the pattern of attitudes in an individual must exhibit a large degree of coherence. This does not mean that people may not be irrational. But the possibility of irrationality depends on a background of rationality; to imagine a totally irrational animal is to imagine an animal without thoughts.

Rationality is precisely proportioned to the experiences in which it is disclosed. To say that there exists rationality is to say that perspectives blend, perceptions confirm each other, a meaning emerges. But it should not be set in a realm apart, transposed into absolute spirit, or into a world in the realist sense.