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From the beginning [[Lacan]] plays on the homophony of '''''le nom du père''''' ('''the [[Name-of-the-Father|name of the father]]''') and '''''le 'non' du père''''' ('''the "[[law|no]]" of the [[father]]'''), to emphasize the '''[[law|legislative and prohibitive function]]''' of the '''[[symbolic]] [[father]]'''.
===Fundamental Signifier===A few years later, in the [[seminar]] on the [[psychoses]], the expression becomes capitalized and hyphenated and takes on a more precise meaning; the [[Name-of-the-Father]] is now the [[fundamental signifier]] which permits [[signification]] to proceed normally.
This [[fundamental signifier]] both confers [[identification|identity]] on the [[subject]] (it names him, positions him within the [[symbolic order]]) and [[signification|signifies]] the [[Oedipal]] [[prohibition]], the 'no' of the [[incest]] [[taboo]].
If this [[signifier]] is [[foreclosed]] (not included in the [[symbolic order]]), the result is [[psychosis]].
In another work on [[psychosis]], [[Lacan]] represents of the [[Oedipus complex]] as a [[metaphor]] ([[paternal metaphor]]), in which one [[signifier]] (the [[Name-of-the-Father]]) substitutes another (the [[desire]] of the [[mother]]).
* [[Oedipus complex]]