Impossible Action

Impossible Action names the structural inhibition that prevents Hamlet from executing the one act his situation—and his father's ghost—demands of him: killing Claudius. Lacan's theoretical move in Seminar VI is to read this inhibition not as a moral failing or a character weakness, but as a symptomatic formation with an unconscious logic determined by the castration complex. Hamlet can act in virtually every other domain (he kills Polonius, engineers the deaths of Rosencrantz and Guildenstern, duels Laertes), yet the specific act of vengeance on the father's murderer/usurper is foreclosed. The "scruples of conscience" that appear at the surface—Hamlet's famous hesitation—are the conscious, symptomatic crust of a deeper structural impasse: Claudius occupies the place of the one who has the phallus (he has taken the father's place with the mother), and Hamlet, organized around the question of being or having the phallus, cannot strike at the man who embodies what his own desire is oriented toward.

The impossibility is therefore not empirical but structural, generated by the intersection of identification, desire, and the castration complex. To kill Claudius would be to annihilate the very figure who has done what Hamlet—as the inheritor of Oedipal desire—unconsciously wishes: to possess the mother and displace the father. The concept is Lacan's lever for arguing that Hamlet is the privileged modern counterpart to Oedipus: where Oedipus unknowingly acts, Hamlet knowingly cannot act, and this reversal indexes a historical shift in the subject's relation to desire—desire is now fully caught in the web of the signifier, mediated by fantasy, and barred from its object by the very structure that constitutes it.

Within jacques-lacan-seminar-6, Impossible Action appears at the pivot point where Lacan moves from the clinical case of Ella Sharpe to a sustained reading of Hamlet as the structuring myth of modern desire. It sits in direct dialogue with the cross-referenced canonical concepts. In relation to Castration, it specifies the clinical consequence of the opposition between being and having the phallus: the forbidden act is forbidden precisely because Claudius is the imaginary possessor of the phallus, and to strike him would be to engage the very site where castration anxiety is most concentrated. In relation to Desire, the impossible action is the negative imprint of desire's structure — desire does not aim at satisfaction but circles around an constitutively unavailable object (das Ding, the mother, the fantasmatic fullness that Claudius now represents); Hamlet's paralysis is desire's law made visible. In relation to Fantasy and the formula $◇a, Hamlet's inhibition can be read as the effect of a fantasy that frames Claudius as occupying the place of objet a — the cause of desire — making him simultaneously the target and the structural condition of Hamlet's desiring. Destroying the cause would dissolve the fantasy frame itself.

The concept also resonates with Identification and the Name of the Father: Hamlet's impossible action is conditioned by his failed or suspended identification with the paternal function — the ghost of the father calls him to act in the Name of the Father, but Hamlet cannot take up that symbolic mandate cleanly because the Oedipal rivalry is alive in him. The concept extends the logic of Neurosis (specifically obsessional neurosis) insofar as the inhibition of the act is a paradigmatic obsessional solution — endless deferral as the way of sustaining desire without ever consummating it. Impossible Action is thus Lacan's shorthand for the structural deadlock at the heart of the Oedipus complex when desire, castration, identification, and the paternal function are all simultaneously in play.

Seminar VI · Desire and Its InterpretationJacques Lacan · 1958 (p.249)

Hamlet is able to do anything - except take vengeance on the man who did away with his father and took that father's place with his mother.

The formulation is theoretically loaded because it defines the impossible action entirely through its object — "the man who did away with his father and took that father's place with his mother" — not through any incapacity of Hamlet as an agent, which means the impossibility is relational and structural rather than psychological; Claudius is positioned as the one who has enacted the Oedipal scenario (displacing the father, possessing the mother), making him precisely the figure Hamlet's castration complex prevents him from touching.