Semiotic provides a basis for understanding the main forms of human activity and their interrelationship, since all these activities and relations ar… - Charles W. Morris

Empirical problems of a nonlinguistic sort are not solved by linguistic considerations, but it is important that the two kinds of problems not be confused and that nonlinguistic problems be expressed in such a form as aids their empirical solution.

There are, then, syntactical problems in the fields of perceptual signs, aesthetic signs, the practical use of signs, and general linguistics which have not been treated within the framework of what today is regarded as logical syntax and yet which form part of syntactics as this is here conceived.

The term "meaning" is not here included among the basic terms of semiotic. This term, useful enough at the level of everyday analysis, does not have the precision necessary for scientific analysis. Accounts of meaning usually throw a handful of putty at the target of sign phenomena, while a technical semiotic must provide us with words which are sharpened arrows. "Meaning" signifies any and all phases of sign-processes (the status of being a sign, the interpretant, the fact of denoting, the significatum), and frequently suggests mental and valuational processes as well; hence it is desirable for semiotic to dispense with the term and to introduce special terms for the various factors which meaning fails to discriminate.