Classical Presupposition Audit — Edward Feser
Instrument: Classical Presupposition Audit (CPA) v1.0. Instrument architecture and analysis: Dave Kelly. Theoretical foundations: Grant C. Sterling. Prose rendering: Claude. Document 67 in the Sterling/Kelly corpus. 2026.
Subject: Edward Feser (1968–), American philosopher in the Aristotelian-Thomistic tradition; Professor of Philosophy, Pasadena City College; prolific public defender of scholastic metaphysics and natural law ethics. Primary sources: Philosophy of Mind: A Beginner’s Guide (2005); The Last Superstition: A Refutation of the New Atheism (2008); Aquinas: A Beginner’s Guide (2009); Scholastic Metaphysics: A Contemporary Introduction (2014); Neo-Scholastic Essays (2015); Five Proofs of the Existence of God (2017); Aristotle’s Revenge: The Metaphysical Foundations of Physical and Biological Science (2019).
Step 0 — Protocol Activation
Corpus in view. Sources restricted to Feser’s own published record. No prior conclusion stated. Feser is Document 67 in the Philosophy CPA cluster (Documents 65–70). Cross-references to Geach (Document 65) and MacIntyre (Document 66) are permitted where load-bearing for distinguishing Feser’s specific profile from the cluster’s Thomist pattern, but no finding is assumed from those precedents. The C1 question is flagged at Step 0 as requiring special attention: Feser’s explicit defense of substance dualism as such — including hylemorphic dualism explicitly framed as a form of substance dualism rather than as an alternative to it — is a potential differentiator from the C1 residual found at Geach and MacIntyre, and this claim is to be verified on Feser’s own textual record rather than assumed.
Self-Audit Complete. Proceed to Step 1.
Step 1 — Presupposition Profile
P1 — Hylemorphic dualism as a genuine form of substance dualism. In Philosophy of Mind and Scholastic Metaphysics, Feser argues that hylemorphic dualism — the Aristotelian-Thomistic account of the soul as the form of the body — is not an alternative to substance dualism but a version of it: the intellective soul in particular is immaterial, not reducible to any physical description, and constitutes the person as a rational subject in a sense that no physicalist account can supply. Feser explicitly distinguishes his position from Cartesian substance dualism but defends both as forms of genuine substance dualism against physicalism and naturalism. This is load-bearing for his entire engagement with philosophy of mind and for his running refutation of the new atheism’s underlying physicalist metaphysics.
P2 — The intellect’s immateriality as argued conclusion. Feser deploys the Thomistic argument that the intellect must be immaterial because it can take on the forms of things without taking on the matter — it grasps the universal, not the particular physical instance — and that no physical system can do this, since any physical system is itself particular and materially constituted. This is load-bearing specifically for C1’s core claim that the rational faculty is not exhaustively constituted by physical conditions: the argument establishes exactly this as a conclusion rather than merely presupposing it.
P3 — Libertarian free will as required by the Aristotelian-Thomistic framework. Feser’s account of moral responsibility, sin, and the natural law’s binding force all require that human beings are genuine originators of their rational choices — not merely that their choices are undetermined by prior physical causes in some minimal sense, but that the rational will is a genuine self-moving power. This is load-bearing for his moral philosophy and for his theology of grace and merit.
P4 — Natural law epistemology: practical reason and human telos. Feser’s natural law ethics across Aquinas, Neo-Scholastic Essays, and Aristotle’s Revenge requires that moral first principles are known through practical reason recognizing the teleological structure of human nature: the first precept of the natural law (“good is to be done and pursued, and evil avoided”) is self-evident to practical reason, but the content of what counts as good is determined by what conduces to genuine human flourishing as given by nature. Moral knowledge is mediated through natural teleology rather than arrived at by direct non-inferential apprehension prior to and independent of that teleological structure.
P5 — Scholastic foundationalism: self-evident first principles. Feser’s scholastic metaphysics explicitly defends the Aristotelian account of per se nota — self-evident first principles known through the terms themselves — as the bedrock of genuine knowledge in both theoretical and practical domains. In Scholastic Metaphysics, the principle of non-contradiction, the principle of causality, and the first precepts of practical reason are all treated as foundational in exactly this sense: not themselves derived from anything more basic, recognizable by any properly functioning rational faculty. This is load-bearing for his entire critique of Humean skepticism, modern naturalism, and the new atheism.
P6 — Correspondence truth and realism throughout. Feser’s realism about universals, causal powers, teleology, and moral facts all presuppose that true propositions correspond to mind-independent states of affairs. His running argument against nominalism, mechanism, and naturalism is precisely that these positions cannot account for the correspondence relation that even their own scientific claims presuppose. No deflationary, pragmatist, or anti-realist qualification of this standard was found as load-bearing in his record.
P7 — Natural law moral realism: objective human telos. Feser’s natural law ethics requires objective moral facts: what counts as genuine human flourishing is determined by human nature and its teleological structure, not by cultural convention, subjective preference, or political consensus. His engagement with sexual ethics, bioethics, and political philosophy all treat this objectivity as the non-negotiable foundation from which applied conclusions follow.
Stage B — Domain Mapping. P1 and P2 are mapped together at C1 as the explicit substance-dualist argument: P1 establishes the framework, P2 establishes the specific philosophical argument for immateriality. P3 is mapped at C2. P4 is mapped at C3 as the specific epistemological mechanism, checked against C3’s direct-apprehension requirement rather than against the broader moral-knowledge question. P5 is mapped at C4. P6 and P7 are mapped at C5 and C6 respectively.
Self-Audit Complete: presuppositions drawn from Feser’s own record; P1/P2 distinguished from Geach’s C1 presupposition at Step 1 rather than assumed identical; P4 held specifically to C3’s direct-apprehension requirement rather than to the moral-knowledge question broadly. Proceed to Step 2.
Step 2 — Commitment Audit
C1 — Substance Dualism. Aligned. P1 and P2 together constitute the most explicitly argued substance-dualist position in the Philosophy cluster. Feser is not merely presupposing a real rational faculty against physicalist reduction; he is arguing for it, defending hylemorphic dualism explicitly as a form of substance dualism, deploying the immateriality-of-the-intellect argument as a positive philosophical conclusion, and doing so in extended, systematic engagement with contemporary philosophy of mind. This distinguishes Feser’s C1 finding from Geach’s and MacIntyre’s Partially Aligned findings at this commitment: where both Geach and MacIntyre affirm a real rational principle irreducible to physical causation but resist the Cartesian specification of the soul as an ontologically independent substance, Feser explicitly defends hylemorphic dualism as substance dualism and deploys the immateriality argument as a positive philosophical result. The remaining difference from Cartesian substance dualism is noted — Feser does not hold that the intellective soul has a natural mode of existence independent of the body in the Cartesian sense — but this remaining difference does not prevent an Aligned finding because Feser’s own explicit argumentative framing identifies his position as a version of substance dualism rather than as an alternative to it.
C2 — Libertarian Free Will. Aligned. P3 is load-bearing throughout Feser’s moral philosophy and his engagement with the problem of determinism. His account of the will as a genuine self-moving rational power is argued explicitly in Scholastic Metaphysics against both hard determinism and compatibilism: compatibilist freedom, on Feser’s account, does not supply what moral responsibility requires. No contrary presupposition was found as load-bearing.
C3 — Ethical Intuitionism. Partially Aligned. P4’s natural law epistemology supplies objective, rational moral knowledge — genuine correspondence with C3’s requirement that moral truth be accessible to the rational faculty. The residual is the same Thomist residual found at C3 across the cluster: the moral knowledge Feser’s framework produces is mediated through practical reason’s recognition of natural teleological structure rather than arrived at by direct, non-inferential apprehension of moral truth independent of that natural-teleological medium. The first precept of the natural law is, on Feser’s own account, known through the terms of practical reason operating on what is naturally good — not through an immediate, self-evident recognition of moral truth prior to any engagement with human nature at all. This is C3’s genuine residual across the Thomist cluster, verified here on Feser’s own text rather than assumed from Geach’s or MacIntyre’s profiles.
C4 — Foundationalism. Aligned. P5’s explicit scholastic foundationalism is the most fully argued foundationalist architecture in the cluster. Feser defends per se nota first principles across both theoretical and practical domains, engages directly with Humean and post-Humean skepticism about self-evident principles, and treats the foundationalist structure as a positive, defended thesis rather than a presupposed background. No tradition-dependence qualification of the kind found at MacIntyre (Document 66) is load-bearing in Feser’s record: his first principles are accessible to any properly functioning rational faculty, not only to participants in a living tradition.
C5 — Correspondence Theory of Truth. Aligned. P6’s correspondence realism is argued explicitly and pervasively: against nominalism (universals are real), against mechanism (causal powers and teleology are real features of the world), and against naturalism (the correspondence relation that even scientific claims require cannot be accounted for on physicalist terms). No deflationary or pragmatist qualification was found as load-bearing.
C6 — Moral Realism. Aligned. P7’s natural law moral realism is the most extensively argued moral-realist position in the cluster by sheer volume of applied-ethics work: Feser’s engagement with sexual ethics, capital punishment, bioethics, and political philosophy all treat objective human telos as the non-negotiable foundation. The moral facts his applied work identifies are presented as genuinely discovered, not constructed, and as binding independently of cultural acceptance.
Self-Audit Complete: all seven presuppositions audited against all six commitments where they bear; the C1 Aligned finding was derived on Feser’s own explicit argumentative framing rather than assumed from the absence of Geach’s or MacIntyre’s specific resistance to the Cartesian specification; the C3 residual was verified independently on Feser’s own text; the C4 finding was explicitly distinguished from MacIntyre’s Partially Aligned finding at C4 by the absence of a tradition-dependence qualification. Proceed to Step 3.
Step 3 — Dissolution Finding
C1: Aligned. C2: Aligned. Neither is Contrary. Per the dissolution rule: No Dissolution.
An agent who adopts Feser’s framework as a governing self-description acquires the fullest philosophical architecture for the rational soul available within the Thomist cluster: an argued, explicit substance dualism, a defended libertarian account of the will, a foundationalist epistemology reaching both theoretical and practical first principles, correspondence truth throughout, and robust natural law moral realism. What the framework leaves requiring supplementation is C3’s direct moral apprehension: the natural law’s epistemological route through teleological human nature is the one point at which the corpus requires more than Feser’s framework delivers.
Self-Audit Complete. Proceed to Step 4.
Step 4 — Summary Finding
Part A — Commitment Pattern
| Commitment | Finding |
|---|---|
| C1 — Substance Dualism | Aligned |
| C2 — Libertarian Free Will | Aligned |
| C3 — Ethical Intuitionism | Partially Aligned |
| C4 — Foundationalism | Aligned |
| C5 — Correspondence Theory of Truth | Aligned |
| C6 — Moral Realism | Aligned |
Five Aligned (C1, C2, C4, C5, C6), one Partially Aligned (C3), zero Contrary, zero Inconsistent, zero Non-Operative. No Dissolution. The cleanest profile in the Thomist sub-cluster and the highest Aligned count among the four Thomists audited (Geach: 4 Aligned; MacIntyre: 3 Aligned; Anscombe: 4 Aligned). The single Partially Aligned finding — C3 — carries the same natural-teleological mediation residual found across the Thomist cluster, here verified independently on Feser’s own account of the natural law’s first precept.
Part B — Dissolution Finding. No Dissolution. C1 Aligned, C2 Aligned. The framework provides the most fully secured account of the rational soul and its freedom of any figure in the cluster.
Part C — Agent-Level Implication. An agent who adopts Feser’s framework acquires an argued substance dualism (C1) rather than a merely presupposed one, the most explicit scholastic foundationalism available in contemporary analytic philosophy (C4), correspondence realism argued against nominalism and mechanism (C5), and the most extensively applied natural law moral realism in the cluster (C6). The one supplement the corpus requires is C3: the direct, non-inferential moral apprehension that Feser’s natural law epistemology approaches in its conclusions — genuine objective moral truth, accessible to reason — without reaching in its method, since the route runs through natural teleology rather than through immediate rational recognition. An agent working within the corpus who finds Feser’s framework attractive would need to supplement it at C3 alone; nothing in his record closes that gap against the corpus, and the supplement is architecturally consistent with his other five commitments.
Corpus boundary. The CPA issues findings on presuppositions embedded in an argumentative record. It does not evaluate Feser’s standing within contemporary scholastic philosophy, the success of his engagement with analytic philosophy of mind, or the merits of his applied natural law conclusions.
Self-Audit Complete: summary follows from Steps 1–3 without new material introduced; agent-level implication addressed to a prospective adopter; the C1 Aligned finding’s distinction from the Thomist cluster’s usual Partially Aligned was stated in the summary rather than left implicit; corpus boundary declared; summary self-contained. CPA run complete.
Theoretical foundations: Grant C. Sterling. Instrument architecture and analysis: Dave Kelly. Prose rendering: Claude.
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