Excerpt from an article by the late George Doris from England, first published
in 1983 in _Self and Society: European Journal of Humanistic Psychology_.

"GRAMMAR deals with word-to-word relations. It embodies rules about how to
put words together into sentences, and it is not concerned with how sentences
are related to each other or how sentences are related to facts. LOGIC goes
further. To a logician, sentences are assertions and he is interested in
relations between assertions ("if this is true, then that is true"). But for
the logician, words need not have any meaning except as defined by other
words, and the assertion need not have any relations to the world of fact.
SEMANTICS goes further than logic -- to the semanticist, words and assertions
have meaning only if they are related operationally to referents in the world
of nature. The semanticist defines not only validity (as the logician does)
but also 'truth'. GENERAL SEMANTICS goes furthest -- it deals not only with
words, assertions and their referents in nature but also with effects on
human behavior. For a 'general semanticist', communication is not merely
words in proper order properly inflected (as for the grammarian) or
assertions in proper relation to each other (as for the logician) or
assertions in proper relation to referents (as for the semanticist), but all
these, together with the reactions of the nervous systems of the human beings
involved in the communication."