As defined by phonology, the linguistic Idea certainly has all the characteristics of a structure: the presence of differential elements, called phonemes, extracted from the continuous sonorous flux; the existence of differential relations (distinctive features) which reciprocally and completely determine these elements; the value of singular points assumed by the phonemes in that determination (pertinent particularities); the manner in which the system of language so constituted assumes the character of a multiplicity, the problematic nature of which objectively represents the set of problems which the language poses for itself, and solves in the constitution of significations; the unconscious, non actual and virtual character of the elements and relations, along with their double status of transcendence and immanence with regard to the sounds actually articulated; the double actualisation of the differential elements, the double incarnation of the differential relations at once both in different languages and in the different significant parts of the same language (differentiation), each language incarnating certain varieties of relation and certain singular points; the complementarity of sense and structure, genesis and structure, where this takes the form of a passive genesis which is revealed in this actualisation.