Necessity - Contingency Undecidability

Necessity–Contingency Undecidability names the structural collapse of the opposition between necessity and contingency at the site of a cause that is simultaneously internal and external to the order it founds. In the Cartesian theological frame Ruda analyzes, God functions as precisely such a cause: his willing is entirely free (contingent) and yet whatever he wills becomes, by virtue of that very willing, absolutely necessary — not because necessity constrains his freedom, but because necessity and contingency are indistinguishable in him. The opposition that normally organizes finite thought (what could have been otherwise vs. what could not have been otherwise) is rendered undecidable at the point of the infinite founding cause. This is not mere paradox or logical slippage; it is a positive structural condition: the eternal truths that govern thought are eternal only because God contingently willed them to be so, and yet they hold with necessity. The ground of necessity is irreducibly contingent, and the act of contingency is retrospectively necessary — each term converts into the other without remainder.

This structure has a precise Lacanian name: extimacy. God, as Ruda reads Descartes, is not a natural power inside thought nor a brute external determination, but an extimate cause — the innermost kernel of the very order of eternal truths that is simultaneously radically outside that order. The inside/outside dualism collapses because the founding contingency inhabits necessity from within, as its unacknowledged but constitutive condition. Fatalism, on this reading, is not the negation of freedom but its precondition: only by passing through the undecidable zone where necessity and contingency can no longer be separated does genuine thought about freedom become possible. The concept thus operates at the intersection of infinite, contradiction, and lack: the infinite God who lacks nothing is precisely the site where the finite distinctions through which thought operates (necessary/contingent, inside/outside, free/determined) are negated without being resolved.

This concept appears in provocations-ruda-frank-abolishing-freedom-a-plea-for-a-contemporary-use-of-fata (p. 70) as part of Ruda's argument that Cartesian fatalism is not an embarrassment to be overcome but a resource for thinking freedom rigorously. It sits at the hinge of Ruda's broader claim that fatalism is the precondition of genuine freedom rather than its opposite. Within the corpus, Necessity–Contingency Undecidability draws on and extends several of the cross-referenced canonical concepts. It is an application of Extimacy: the Cartesian God is precisely that extimate cause — closest to thought as the source of its eternal truths, yet radically exterior as a free, contingent will — which dissolves the inside/outside opposition structuring finite cognition. It engages Contradiction in the Hegelian sense: the two opposed categories (necessary/contingent) do not simply alternate or compromise but coexist in a way that neither cancels the other, making undecidability itself a positive structural fact rather than a cognitive failure. It resonates with the concept of the Infinite: Ruda's God is precisely the "true infinite" that includes its own limit from within, as opposed to the bad infinite of endless, unresolved alternation between freedom and determination. And it touches Lack obliquely: the very undecidability of necessity and contingency introduces a lack into the symbolic order of eternal truths — there is no metalevel from which one could adjudicate which side of the distinction applies, mirroring the Lacanian claim that there is no Other of the Other to guarantee the system. The concept also cross-references The big Other and The Other of the Other, consistent with the idea that the Cartesian God functions as a big Other whose very omnipotence reveals the absence of any further guarantee — he is the locus at which necessity is grounded, but that grounding is itself groundlessly contingent, marking the Other's constitutive incompleteness.

Abolishing Freedom: A Plea for a Contemporary Use of FatalismFrank Ruda · 2016 (p.70)

in God necessity and contingency become undecidable and indistinguishable, as whatever he contingently wills becomes necessary due to fully contingent reasons. His 'actions were completely free, yet were also completely necessary.'

The phrase "undecidable and indistinguishable" does the heaviest theoretical work: it does not say necessity and contingency are identical or that one reduces to the other, but that the distinction itself becomes inoperative — a stronger, more unsettling claim that positions God as the point where the categories constitutive of finite thought (and of any possible fatalism/freedom debate) can no longer take hold. The embedded quotation "completely free, yet also completely necessary" then enacts this undecidability syntactically, holding both predicates in full force simultaneously rather than qualifying either.