"Carnap : a language, as e.g. English, is a system of activities or, rather, of habits, i.e., dispositions to certain activities, serving mainly for the purposes of communication and of co-ordination of activities among the members of a group."

“Ajdukiewicz's view, published in the Erkenntnis, certainly did not fail to influence the opinions held by the neo-positivist supporters of semantic philosophy. But Ajdukiewicz was not alone in his opinions which fitted Carnap's principle of tolerance and, e.g., the theories of C. G. Hempel.”

“When in accordance with the materialistic analysis of the cognitive process we consider thought and human consciousness as linguistic thought, as thought made of language , it is evident that any analysis of the cognitive process must also be the analysis of the linguistic process, without which thought is simply impossible.”

“Science and ideology are closely connected to each other, in spite of those pedants who would like to separate them. In any case, since social praxis, which produces and promotes the develópment of language, is the common basis for both the relatively objective knowledge of the world, and for attitudes of evaluation, a genetic link exists.”

“For Bréal, semantics was the science the subject matter of which was study of the cause and structure of the processes of changes in meanings of words: expansion and contraction of meanings, transfer of meanings, elevation and degradation of their value, etc.”

“A system of opinions which, being founded on a system of accepted values, determines the attitudes and behavior of men with respect to desired objectives of development of the society, social group or individual.”

“De Saussur... develops the concept of semiology as the science which studies the functioning of signs in society, and treats linguistics as a branch of such a general science of signs.”