"The theory of communication is partly concerned with the measurement of information content of signals, as their essential property in the establishment of communication links. But the information content of signals is not to be regarded as a commodity; it is more a property or potential of the signals, and as a concept it is closely related to the idea of selection, or discrimination. This mathematical theory first arose in telegraphy and telephony, being developed for the purpose of measuring the information content of telecommunication signals. It concerned only the signals themselves as transmitted along wires, or broadcast through the aether, and is quite abstracted from all questions of "meaning." Nor does it concern the importance, the value, or truth to any particular person. As a theory, it lies at the syntactic level of sign theory and is abstracted from the semantic and pragmatic levels. We shall argue … that, though the theory does not directly involve biological elements, it is nevertheless quite basic to the study of human communication -- basic but insufficient."

“we can strip off all grammatical clues to sentence structure, all affixes and prepositions, and yet still achieve communication. Thus restricted to nouns, simple "stories" can be told in word chains: Woman, street, crowd, traffic, noise, haste, thief, bag, loss, scream, police.... Again, the reader's past experience of his language is sufficient to restore the missing elements, sufficiently accurately for the purpose. But of course, not only does the reader have experience of sentence structure, enabling him to supply the missing syntactical elements, but also he has experience of typical contexts in which the various words are used; many words bear an aura about with them. It might be more difficult to tell a tale about a policeman who robbed a woman, for instance, with so little redundancy!”

“To take another simile , if we imagine a great library containing books which have a vast number of cross references one to another, then should one whole shelf be burned, it might be possible to reconstruct the lost books -- but somewhat less perfectly than at first.”

“Language performs an essentially social function; it helps us to get along together, to communicate and achieve a great measure of concerted action. Words are signs which have significance by convention, and those people who do not adopt the conventions simply fail to communicate. They do not "get along" and a social force arises which encourages them to achieve the correct associations.”

“Physically, we transmit signals or signs -- audible, visual, tactual. But the mere transmission and reception of a physical signal does not constitute communication. A sign, if it is perceived by the recipient, has the potential for selecting responses in him. Physically, when we communicate, we make noises with our mouths, or gesticulate, or exhibit some token or icon, and these physical signals set up a response behavior.”

“The suggestion that words are symbols for things, actions, qualities, relationships, et cetera, is naive, a gross simplification. Words are slippery customers. The full meaning of a word does not appear until it is placed in its context, and the context may serve an extremely subtle function -- as with puns, or double entendre. And even then the "meaning" will depend upon the listener, upon the speaker, upon their entire experience of language, upon their knowledge of one another, and upon the whole situation. Words do not "mean things" in a one-to-one relation like a code. Words, too, are empirical signs, not copies or models of anything; truly, onomatopoeia and gestures frequently seem to possess resemblance, but this resemblance does not bear too close examination. A cockerel may seem to say cook-a-doodle-do to an Englishman, but a German thinks it says kikeriki, and a Japanese kokke-kekko. Each can paint only with the phonetic sound of his own language.”

“Information" in most, if not all, of its connotations seems to rest upon the notion of selective power. The Shannon theory regards the information source, in emitting the signals , as exerting a selective power upon the ensemble of messages. In the Carnap-Bar-Hillel semantic theory, the information content of statements relates to the selective power they exert upon ensembles of states. Again, at its pragmatic level, in true communicative situations a source of information has a certain value to a recipient, where "value" may be regarded as a "selective power." Gabor, for example, observes that what people value in a source of information depends upon its exclusiveness and prediction power; he cites instances of a newspaper editor hoping for a "scoop" and a racegoer receiving information from a tipster. "Exclusiveness" here implies the selecting of that one particular recipient out of the population, while the "prediction" value of information rests upon the power it gives to the recipient to select his future action, out of the whole range of prior uncertainty as to what action to take. Again, signs have the power to select responses in people, such responses depending upon a totality of conditions. Human communication channels consist of individuals in conversation, or in various forms of social intercourse. Each individual and each conversation is unique; different people react to signs in different ways, depending each upon their own past experiences and upon the environment at the time. It is such variations, such differences, which gives rise to the principal problems in the study of human communication.”