From all this it follows what the general character of the problem of the development of a body of scientific knowledge is, in so far as it depends on elements internal to science itself. – Talcott Parsons

But the scientific importance of a change in knowledge of fact consists precisely in j its having consequences for a system of theory. – Talcott Parsons

The implications of these considerations justify the statement that all empirically verifiable knowledge even the commonsense knowledge of everyday life – involves implicitly, if not explicitly, systematic theory in this sense. – Talcott Parsons