Name of the Father
Psychosis for Lacanians is the exact opposite of the Name of the Father – the absence of that identification with the symbolic order which ensures our place in the shared intersubjective world of common sense. The Name-of-the-Father is thus the fundamental signifier which permits signification to proceed normally. It not only confers identity and position on the subject within the symbolic order, but also signifies the Oedipal prohibition (the "no" of the incest taboo).