Retroactive Positing of Reasons

Retroactive Positing of Reasons names the structure of a truly autonomous act in which the grounding of the act is not found in pre-existing norms, principles, or deliberative reasons that the agent consults before acting, but is instead generated by the act itself after the fact. The act comes first; its justification is a retroactive product of what the act has already accomplished. This is not irrationalism—the act is not groundless—but rather a circular, self-grounding movement: the reasons are real, but they are posited (in the Hegelian sense of gesetzt, set down) only through and after the act that they appear to ground. The circularity is constitutive, not vicious.

Žižek develops this concept in explicit defense of his thesis of ontological incompleteness against Pippin's Kantian transcendental-apperception model of freedom. For Pippin, rational agency consists in the application of pre-given normative commitments that the agent endorses through apperceptive self-awareness. For Žižek, this model cannot account for the truly abyssal moment of freedom—the point at which freedom is not the application of a rule but the institution of one. A genuinely free act must in some sense precede its own reasons, producing them rather than deriving from them. This aligns with the Lacanian principle that the subject is always retroactively constituted—nachträglich (après-coup)—so that what appears as origin is always already an effect of what follows. The "hole" in phenomenal reality that Kantian freedom implies is precisely this gap: the interval between the act and the reasons that will have grounded it, a gap that cannot be closed without collapsing freedom into mechanism.

This concept appears in todd-mcgowan-dominik-finkelde-eds-zizek-responds-bloomsbury-publishing-2022 (p. 113) as part of Žižek's defense of ontological incompleteness. It is positioned against Pippin's reformist, social-democratic reading of Hegel, which Žižek characterizes as abstractly incomplete in the sense that "Abstract" carries in this corpus: a one-sided determination that has not passed through its own contradiction. The retroactive positing of reasons is precisely what a merely normative-apperceptive account of freedom cannot accommodate, because such an account treats the agent's rational framework as always already in place—i.e., as a completed, non-contradictory whole.

The concept articulates most directly with Contradiction and Dialectics as cross-referenced canonicals. The circular self-grounding of the act is a dialectical structure in the Hegelian sense: reason does not precede the act as an external norm but emerges from within the act's own movement, embodying the contradiction between freedom and determination. It also resonates with the Death Drive, insofar as both concepts involve a movement that is not oriented by a pre-given telos but constitutes its own ground retroactively through repetition and circular return. The concept implicitly challenges Ideology as well: if reasons are always retroactively posited, then any ideological framework that presents its norms as natural, pre-given, or rationally self-evident is concealing the abyssal act of institution that originally posited those very norms. The retroactive positing of reasons thus names the hidden genesis that ideology covers over.

Žižek Responds!Todd McGowan & Dominik Finkelde (eds.) · 2022 (p.113)

an act is abyssal not in the sense that it is not grounded in any reasons, but in the circular sense that it retroactively posits its reasons

The quote is theoretically loaded because it distinguishes two senses of "abyssal"—sheer groundlessness versus circular self-grounding—and it is the second, circular sense that does the real philosophical work: the word "retroactively" encodes the Lacanian-Hegelian logic of Nachträglichkeit (the after-effect constituting the before), while "posits" (setzt) carries the full Hegelian weight of self-institution, indicating that reasons are not discovered but produced through the very act they will have grounded.