Unlike functionalists, who claim that language has developed to serve the function of communication, Chomsky identifies language with the cognitive faculty itself. Thought, to Chomsky, is not about communication, but about conceptualizing and systematizing knowledge. Humans do this with a cognitive system called language. Language, according to Chomsky is the cognitive system which is particular to the human mind. Finding a foundation in Descartes, though rejecting his substance dualism, Chomsky explains how language is universal to all humans, because it is the defining feature of our nature: res cogitas. In a debate against Foucault, who is skeptical to the notion that there is a human nature transcending historical context, Chomsky explains that he believes in a universal human nature, which in principle can be understood as several systems, but which currently is most fully and most scientifically understood as a linguistic system.
What is the scope of linguisics according to chomsky? Some points on universal grammar:
- generative grammar proposes to understand language in terms of syntactic categories. Not function or relational arbitrations.
- Rules of natural languages are not universal. It is the conditions which govern the rules that are universal.
- language is generated by innate grammar. (Chomsky does not use the term «the innateness hypothesis». He says nobody has ever disagreed that there is something innate. The term therefore is misleading. UG can be understood as Platos innateness hypothesis (from the dialogue Meno) purged of preexistence, cf. Leibniz and Cudworth, but that is not the complete picture of UG.)
- There are certain truths that are entirely contained within the universal grammar, i.e. their truth value is contained within the internal relations of sentences. E.g: «i persuaded him to...» entails «he (now) intends to...» or in the sentence «john saw him» it is clear that john is not the reference of «him». However: truth values are rarely determined within the syntax of grammar itself: most sentences are determined by the facts of the world itself and are not known a priori.
- semantics is not universal, at least there is no theory as yet which advocates such a view. This means that grammar is primary to semantic meaning.
This has implication for the structure of thoughts: they are determined by the universal grammar with reference only to the facts of the world. Meaning all semantic content is created with reference to the world. (This is good news for socrates and aristotle, not so much for plato).
- The factor which determines semantic content is called deep structure. Deep structure lies above the level of universal grammar, but on the level of the mind, not production. Surface structure is the physical manifestation of that content in phonology.
The main service of the deep structure is embedding theme into sentences. Surface structure contain the cues for understanding utterances, but this is not to say that language primarily serves the function of communications. Rather, there is a logic to the surface structure that lends itself to interpretation by comparing it to other formal or informal schemas. Logic (e.g. of the propositional kind) is an abstraction of the surface structure, not a feature of deep structure. (NB! Deep structure is not universal grammar. Deep structure is specific to natural languages, although it may in practice be common to all of them.)
Furthermore, elements on the level of surface structure are not always visible, i.e. They can be realized in the structure without being realized in physics.
- There is no proof to suggest that language is a global phenomenon in the brain. Beliefs and attitudes are intertwined with language in the real world, but they are not part of language itself.
- in natural languages facts enter into the structure of sentences. Between agents and action there is often purpose, instrument, intention, etc... this is fact entering the language and these relations are not part of universal grammar.
Universal Grammar in sum: UG is not grammar. Grammar qua grammar is stipulated in the deep and surface structures og language. UG is the theory of what is behind grammar. Logic - if there are such things as innate logical rules, as many philosophers suggest, and not just apparent rules abstracted from cognitive practice - is situated at the level of deep structure: it is the basic rule of thought, but it is not the condition for the existence of these rules. UG is the theory of these conditions.
Challenges to the Generative theory of language:
- From Structuralism: the fact that language is not a code seems counterintuitive. The element of phonemes; the fact that only perceptible changes in pronunciation can enact changes in meaning does seem to point to this, although this is a minor intervention. The code view is common to both behaviorists and saussureans.
- From Cognitive linguists: the language as global intervention: there is little evidence to suppose that language is different to other cognitive events. There is thus little reason to stipulate the existence of a language faculty in the brain that is seperate from the rest of brain activity.
- From Functionalism: the social aspect of the development of language (in infants) seems to indicate that language is aquired specifically for the sake of communication. In this view, language is part of a larger system of communication also involving non-linguisic practices. The communications view of language is not the same view as language as code. In the functionalist view there are considerations of body, local relevance, and dialogic creativity, so language as communication will be better understood as coordinating intentionalities rather than as code.