Sexual Difference as Ontological Problem

Sexual Difference as Ontological Problem names the thesis, developed in what-is-sex-alenka-zupancic, that sexual difference cannot be reduced to a merely empirical or cultural variation within an already-constituted signifying field. Rather, it designates the condition of possibility — and impossibility — of that field itself. The argument proceeds from a negative-ontological premise: the signifying order does not form a closed, consistent totality because something is constitutively lacking in it. This irreducible gap and the surplus-enjoyment (jouissance) it generates are not secondary effects of signification but its very ground. Sexuation — the way subjects are positioned as irreducibly "sexed" in relation to the phallic function — is configured on and through this ground. Sexual difference is therefore ontological in the strict sense: it concerns the structure of being and negativity that makes the subject of the unconscious possible, not a taxonomy of biological or social types.

The force of the concept lies in its reversal of the standard constructivist account. Rather than saying "the symbolic order produces sexual difference as one of its effects," Zupančič argues that the constitutive incompleteness of the symbolic order — its lack, its gap — is what makes sexuation unavoidable. The subject does not first enter a complete language and then get sexed; it enters a language that is already fractured by lack, and it is precisely that fracture which renders the subject irreducibly sexed. Sexual difference thus names a problem that the signifier cannot solve and cannot dissolve: it is the ontological scar left by the fact that the signifying order cannot totalize itself.

This concept appears in what-is-sex-alenka-zupancic and functions as a pivot that reorients several canonical Lacanian concepts simultaneously. It presupposes and radicalizes the canonical concepts of Lack and Gap: if lack is the constitutive void that the signifier introduces into the real, and the gap is the structural opening that prevents the symbolic order from closing over itself, then Sexual Difference as Ontological Problem is the name for what that lack and gap force upon the subject — namely, a position within the sexual non-relation that cannot be transcended or synthesized. Rather than treating lack as a generic feature of the signifying order, Zupančič specifies it: the particular form in which the gap manifests for embodied speaking subjects is sexual difference. The concept is thus an extension and specification of the Lack and Gap concepts, applied to the domain of sexuation.

The relation to Language and Negative Ontological Presuppositions is equally structural: language "uses" subjects and robs them of being precisely because it is incomplete, and the concept of Sexual Difference as Ontological Problem names the libidinal-subjective consequence of that incompleteness. Objet petit a enters as the correlate of this lack — the surplus-enjoyment that falls from the failed signifying operation and around which sexed desire circulates. Condensation and Point de capiton supply the signifier-structural background: condensation shows how multiple drives and meanings can be over-determined at a single node, while the point de capiton is the quilting mechanism that temporarily arrests the sliding of signification — both pointing to the instability that the ontological problem of sex inhabits. Contradiction names the logical form of this ontological problem: the sexed subject is constituted by an internally contradictory pair of propositions (as in Lacan's formulas of sexuation), meaning sexual difference is not a binary opposition but a genuine logical antinomy that cannot be resolved.

What Is Sex?Alenka Zupančič · 2017 (p.70)

sexual difference (and all the contrived dialectics of sexuality, desire, love) is the consequence—not simply of the signifying order, but of the fact that something is lacking in it

The phrase "not simply of the signifying order, but of the fact that something is lacking in it" performs the entire theoretical move: the prepositional shift from "of the signifying order" to "of the fact that something is lacking in it" demotes the signifier from sufficient cause to insufficient condition, installing lack — the incompleteness of the symbolic structure itself — as the deeper ontological ground. "Something is lacking in it" is precisely Lacan's formula for the non-All, for S(Ø), and its placement here as the generative cause of sexual difference elevates sex from cultural effect to ontological problem.