The issue focused on the problem of refutation: it is not to be taken as a single thing, as in a single line, as in a single subject, as in a single example, as in a single body of work, as in a single body of thought, as in a single body of experience, as in a single body of experience. The question of refutation is to be taken with a large body of experience, in the form of an experience of the real the world, of the real or