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With the proposal of a new theory about linguistic sign, we think we are also proposing a new metalinguistic theory of human languages. Because our sign conception is topologico-dynamic, nonsymmetrical and with capacity to integrate previous conceptions, thus language is dynarnic like Generative Grammars or the new mathematical theories about it; it is also asymmetrical like Liminar Grammars -rather, its asymmetry is two-faced, because we put, in the same equalizing level, Semantics and Syntax- and it is finally integrative of Stoic sign, Peircean sign, structural sign, etc. as Perceptual and Cognitive Grammars are, at the same time, integrative of old linguistic schools.
After that, this new signic proposal can decluctively hypothethize the nature and number of the linguistic sciences, what are the boundaries among them and why the relation between each part of the sign can justify well-known criteria of 'necessity' 'arbitrariness' and 'motivation' in the analysis.
Lastly, perceptual dynamismus lets us mainlain that each linguistic science exercises as metalanguage to make explicit the other object-linguistic sciences, acting from nucleus to periphery, and viceversa, always in a two-faced vectorial reading of the World/Language relation. With this, the integrative system leads us even to Phonical and Lexical Pragmatics, not only to Semantics-and-Syntax binomial.
