The part an actor played on stage was once written on a separate roll of paper.

Sociology should... be thought of as a science of action-of the ultimate common value element in its relations to the other elements of action.

A gloss is a total system of perception and language.

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

If observed facts of undoubted accuracy will not fit any of the alternatives it leaves open, the system itself is in need of reconstruction.

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 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.