Is it rational for a a pre-industrial, within a culture where ideas are predominant, to believe in the Gods of the rain and the sun to determine their agrarian behaviour? What if, they believed that the sun gods favoured them well to engage in practices which, it would seem, to improve yield of their produce; as an effect of their behaviour and a sign of their favourment by the Gods?
Perhaps rationality is governed by the most ultimate standards of what we know. To say that the ultimate global perspective is fundamentally local, is an axiomatic primitive, even perhaps a logical or linguistic norm to govern our intellectual conduct?
This is as simple as accepting we could be wrong; and yet, we ground the conditions of objectivity on the fundamentals of our subjective consciousness. This is the Kantian epistemological message at its most fundamental