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

A theoretical system does not merely state facts which have been observed and that logically deducible relations to other facts which have also been observed.

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

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

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.

Spencers god was Evolution, sometimes also called Progress.

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.