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

Empirical interest will be in the facts so far as they are relevant to the solution of these problems.

But the fact a person denies that he is theorising is no reason for taking him at his word and failing to investigate what implicit theory is involved in his statements.

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.

The importance of certain problems concerning the facts will be inherent in the structure of the system.

Special emphasis should be laid on this intimate interrelation of general statements about empirical fact with the logical elements and structure of theoretical systems.