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.

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

There is a fascinating entanglement of science and knowledge, which is expressed as scientific knowledge.

Scientific knowledge is a kind of discourse.

It is that of increasing knowledge of empirical fact, intimately combined with changing interpretations of this body of fact - hence changing general statements about it - and, not least, a changing a structure of the theoretical system.

Scientific knowledge is in perpetual evolution; it finds itself changed from one day to the next.