A gloss is a total system of perception and language.

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

Now obviously the propositions of the system have reference to matters of empirical fact; if they did not, they could have no claim to be called scientific.

The main concern of the study is with the outline of a theoretical system. Its minor variations from writer to writer are not a matter of concern to this analysis.

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

That is, a system starts with a group of interrelated propositions which involve reference to empirical observations within the logical framework of the propositions in question.