Classical Presupposition Audit — Michael Huemer
Classical Presupposition Audit — Michael Huemer
Source document: “Apology of a Modest Intuitionist,” Michael Huemer, Philosophy and Phenomenological Research, Vol. LXXVIII No. 1, January 2009. Instrument: Classical Presupposition Audit (CPA) v1.0. Instrument architecture: Dave Kelly. Theoretical foundations: Grant C. Sterling’s corpus. Prose rendering: Claude (Anthropic), 2026.
Step 0 — Protocol Activation
The subject is Michael Huemer, philosopher at the University of Colorado, Boulder. The source for the presupposition profile is his peer-reviewed article “Apology of a Modest Intuitionist” (2009), a response to symposium critics of his book Ethical Intuitionism. All presuppositions entered in Step 1 are drawn from this document exclusively.
Source limitation: This audit is constructed from a single article. Huemer’s broader philosophical record — his books, other published articles, his work in political philosophy and epistemology — is not in view. Findings on commitments where this document is silent (C1, C2) reflect the limits of the source, not the limits of his positions. A comprehensive CPA would require examination of his full public record.
Self-Audit — Step 0:
- Is the corpus in view? Yes — the six commitments and their governing passages are available.
- Have the sources been identified and restricted to the figure’s own public record? Yes — the single source document, his own authored argument.
- Has any prior conclusion about findings been stated or implied? No.
Self-Audit Complete. Proceeding to Step 1.
Step 1 — Presupposition Profile
Stage A — Argumentative Record Summary
Position 1: The dual-thesis structure of intuitionism. Huemer distinguishes two theses in his book: an epistemological thesis (some moral truths are known intuitively) and a metaphysical thesis (nonreductive moral realism). He presents these as mutually supporting. The epistemological thesis requires that moral knowledge not be derivable from non-moral sources; the metaphysical thesis requires that moral facts not be reducible to natural facts. Each thesis props up the other. Load-bearing presupposition: there exist objective moral facts that are both irreducible and directly accessible to rational apprehension.
Position 2: The elimination of alternative epistemologies. Huemer identifies five possible sources of moral knowledge — intuition, observation, conceptual analysis, deduction from non-moral claims, inference to best explanation — and argues that his chapter 4 rules out all but intuition. Load-bearing presupposition: moral knowledge must have a source, and that source is non-inferential. This is a foundationalist commitment: some moral beliefs are epistemically basic.
Position 3: Phenomenal Conservatism (PC). Huemer’s governing epistemological principle is that if something seems true to S and S has no defeaters, S has prima facie justification for believing it. He argues that appearances — sensory experiences, intellectual intuitions, quasi-memories, introspective states — share a common property in virtue of which they dispose us to believe their contents, and that this property alone is what confers propositional justification. Load-bearing presupposition: the seeming-true of a proposition, in the absence of defeaters, is sufficient for prima facie epistemic justification.
Position 4: The unity of appearances. Huemer argues that sensory experiences and moral intuitions belong to the same epistemological category: both are appearances, and it is being an appearance — not the specific qualia, intentional content, or causal mechanism — that confers justificatory force. He supports this with a five-case analysis (cases a–e) showing that the disposition to believe tracks the presence of an appearance-state, not its sensory or causal features. Load-bearing presupposition: there is no epistemologically relevant difference between sensory and intellectual intuition that would license crediting one and not the other.
Position 5: Defeaters for ethical intuitions. Huemer acknowledges that many ethical intuitions can be defeated: evolutionary pressures, emotional bias, and psychologically irrelevant factors (noise levels, scent, disgust states) can distort moral judgment. But he argues that not all intuitions carry defeaters. Certain rational intuitions — the transitivity of “better than,” the pro tanto value of enjoyment, the ceteris paribus preference for improving a conscious being’s condition — are products of rational reflection in the way mathematical and metaphysical intuitions are, and are not plausibly explained as evolutionary distortion or emotional bias. Load-bearing presupposition: there is a distinction between reliable and unreliable intuitions, with reliable ones tracking objective moral facts.
Position 6: The cultural displacement thesis. Huemer hypothesizes that intuitionism’s fall from professional favor was caused by cultural and personal biases operating before argument, not by decisive refutation of its claims. He argues that initial biases shape which theories receive sympathetic investigation, which arguments seem plausible, and thus which positions end up as considered opinions — without those biases themselves being subjected to examination. He accepts Schroeder’s suggestion that non-cognitivism and reductionism became popular partly because they give philosophers more to do. Load-bearing presupposition: professional philosophical consensus is not a reliable indicator of philosophical truth; bias is a structural feature of philosophical opinion formation.
Stage B — Domain Mapping
Huemer’s presuppositions are consistent across domains within this document. His epistemological positions (PC, the unity of appearances, the foundationalist structure of moral knowledge) are integrated with his metaphysical positions (nonreductive moral realism, the existence of objective moral facts) without tension. His empirical claim about the sources of professional bias is offered as a sociological observation compatible with his epistemological framework, not as a competing account. No domain variation requiring an Inconsistent finding has been identified.
Self-Audit — Step 1:
- Are the presuppositions drawn from the figure’s own record? Yes — each is traceable to a specific argumentative move in the document.
- Have I applied the load-bearing test? Yes — peripheral elaborations have been set aside.
- Have I applied the charity requirement? Yes — ambiguous passages have been read in Huemer’s favor.
- Have I mapped domain variations? Yes — no significant variation detected.
Self-Audit Complete. Proceeding to Step 2.
Step 2 — Commitment Audit
C1 — Substance Dualism (Rational Faculty as Distinct Substance)
The commitment requires that the rational faculty — the seat of judgment and assent — be genuinely distinct from body and external conditions, not reducible to physical states. Sterling’s governing claim: “I am my soul/prohairesis/inner self. Everything else, including my body, is an external.”
Huemer’s article does not address mind-body ontology. His treatment of appearances — sensory experiences, intellectual intuitions — as mental states with a common phenomenal property is compatible with both physicalism and substance dualism. Phenomenal Conservatism does not require that the mind be a distinct substance; a physicalist could accept it. Huemer neither asserts nor denies substance dualism in this document.
Finding: Non-Operative. The commitment’s domain is absent from this document’s argumentative record. No load-bearing presupposition about the ontological status of the rational faculty can be identified in the source. A comprehensive CPA drawing on Huemer’s full philosophical record — including his work on consciousness and political philosophy — would be required to issue a substantive finding.
C2 — Libertarian Free Will (Origination of Assent)
The commitment requires that assent be the genuine act of an originating agent, not a determined output of prior physical causes. Sterling’s governing claim: choosing whether or not to assent to impressions is the only thing in our control — and it must be genuine origination for that control to be real.
Huemer’s article does not address agency, determinism, or the causal structure of belief formation in any way that requires a position on libertarian free will. His discussion of cultural and personal biases in philosophical opinion formation is a causal-psychological observation, not a committed position on the freedom of the will. His epistemological claims about the justificatory force of appearances do not presuppose any particular account of agency.
Finding: Non-Operative. The commitment’s domain is absent from this document’s argumentative record. The same source limitation noted under C1 applies.
C3 — Ethical Intuitionism (Direct Apprehension of Moral Truth)
The commitment requires that some moral truths be known through direct rational apprehension — not inferred from prior premises, not derived empirically, but grasped as self-evident necessary truths by the rational faculty. Sterling’s governing claim: the rational faculty must be able to apprehend directly that virtue is the only genuine good, in the way mathematical necessity is apprehended.
This is Huemer’s explicit and central thesis. His epistemological thesis — that some moral truths are known intuitively — is the defining claim of the work under discussion. He argues that intuitions provide prima facie justification for moral beliefs through Phenomenal Conservatism; that the appearance of moral truth is structurally identical to the appearance of mathematical or metaphysical truth; and that certain rational moral intuitions (the transitivity of “better than,” the ceteris paribus claim that enjoyment is pro tanto good) are not plausibly explained as bias, evolutionary artifact, or emotional distortion. These intuitions result “from a grasp of the relevant concepts, in just the same way as the intuitions that two is less than three.”
He further argues that the professional marginalization of intuitionism was produced by cultural bias operating before argument, not by decisive refutation — a position that presupposes the continuing validity of direct moral apprehension despite its professional disfavor.
Finding: Aligned. Huemer’s argumentative record in this document requires, at every load-bearing point, the presupposition that some moral truths are directly accessible to rational apprehension without inferential mediation. This is C3 in both structure and substance. No contrary presupposition qualifies the finding.
C4 — Foundationalism (Structured Dependency of Truths)
The commitment requires that the structure of knowledge exhibit dependency relations anchored in a non-inferential base — that some truths be epistemically basic, justified without derivation from prior premises, and that inferential truths depend on these basics for their warrant.
Huemer’s Phenomenal Conservatism is a foundationalist epistemology. He explicitly distinguishes inferential from non-inferential sources of moral knowledge, lists five possible routes to moral knowledge, and argues that all inferential routes (observation, conceptual analysis, deduction from non-moral claims, inference to best explanation) fail to account for moral knowledge. What remains is intuition — the non-inferential base. Appearance-states confer propositional justification directly, not by derivation.
His account of what confers justification vs. what is required for justification further reflects a foundationalist structure: appearances are what is responsible for justification; the absence of defeaters is a condition required but not itself responsible. His roof, car, and Caesar analogies make explicit that the base element must be what is causally responsible for the superstructure, not merely the absence of what would have removed it.
Finding: Aligned. Huemer’s epistemological architecture in this document requires a foundationalist structure at every load-bearing point. Some moral beliefs are non-inferentially justified through appearances; all inferential routes to moral knowledge are argued to fail. No contrary presupposition qualifies the finding.
C5 — Correspondence Theory of Truth (Truth as Alignment with Reality)
The commitment requires that truth be a relation between a claim and the way things actually are — not a matter of coherence, consensus, pragmatic utility, or social construction. A belief is true when it corresponds to what is actually there; false when it does not.
Huemer’s entire treatment of defeaters presupposes the correspondence account. An intuition is defeated when there are grounds for thinking it is “false or unreliable” — where falsity means failure to correspond to objective moral reality, and unreliability means systematic failure to track that reality. His analysis of the seven psychological studies proceeds by asking which of them bears on the reliability of moral intuition as a tracker of objective moral facts — only experiment 4, which studied actual moral judgment, is relevant “from the realist’s point of view.”
His argument that certain rational intuitions — the transitivity claim, the pro tanto value of enjoyment — are not plausibly explained as bias presupposes that there is an objective moral fact to track, and that the intuitions in question track it. His cultural displacement thesis presupposes that the professional consensus against intuitionism does not make intuitionism false; truth is not determined by consensus but by correspondence to moral reality.
Finding: Aligned. Huemer’s argumentative record in this document requires the correspondence account at every load-bearing point where truth is in question. No contrary presupposition qualifies the finding.
C6 — Moral Realism (Objective Value Structure)
The commitment requires that moral facts be objective features of reality — not projections of subjective preference, cultural construction, or natural facts redescribed. Moral claims are truth-apt in the full realist sense.
This is Huemer’s explicit metaphysical thesis: the “nonreductive form of moral realism” he identifies as the book’s central metaphysical claim. He defends it against ethical naturalists who would reduce moral facts to natural facts, arguing that their epistemological advantages are illusory and that their accounts of moral knowledge fail. His argument that only intuition survives as a source of moral knowledge presupposes that there are moral facts to be known. His treatment of the seven psychological studies distinguishes between studies of “subjective (and nearly arbitrary) preferences” and studies of “distortions in a class of judgments of objective fact” — the latter being what moral judgments are.
His “revisionary intuitionism” position — that many currently accepted ethical beliefs may be wrong while nihilism is still to be rejected — presupposes that there is a moral reality against which current beliefs can be tested and found wanting.
Finding: Aligned. Huemer’s argumentative record in this document requires nonreductive moral realism at every load-bearing point. No contrary presupposition qualifies the finding.
Self-Audit — Step 2:
- Have I applied the load-bearing test to each finding? Yes — peripheral claims set aside throughout.
- Have I cited specific argumentative moves for each presupposition-commitment pair? Yes.
- Have I avoided Inconsistent Evasion (Failure Mode 3)? Yes — no domain variation requiring an Inconsistent finding was detected.
- Have I avoided Non-Operative Evasion (Failure Mode 6)? Yes — C1 and C2 are Non-Operative because Huemer’s argumentative record in this document genuinely does not operate in those commitment domains, not to avoid a Contrary finding.
- Have I avoided Corpus Boundary Violation (Failure Mode 7)? Yes — no finding about the strategic, political, or institutional implications of Huemer’s positions has been issued.
Self-Audit Complete. Proceeding to Step 3.
Step 3 — Dissolution Finding
The dissolution criterion is governed exclusively by findings on C1 and C2. Full Dissolution requires Contrary findings on both; Partial Dissolution requires a Contrary finding on one. No Dissolution requires Aligned or Partially Aligned findings on both.
Both C1 and C2 are Non-Operative in this audit. The dissolution criterion cannot engage. Huemer’s argumentative record in this document makes no claims about the ontological status of the rational faculty or the causal structure of assent. No framework-implication finding about whether agents who adopt his position are required to locate themselves and their condition in externals can be derived from the available record.
Dissolution Finding: Non-Applicable. The criterion cannot be applied. A source-expanded CPA drawing on Huemer’s full philosophical record would be required to issue a dissolution finding.
Step 4 — Summary of Findings
C1 — Substance Dualism: Non-Operative
C2 — Libertarian Free Will: Non-Operative
C3 — Ethical Intuitionism: Aligned
C4 — Foundationalism: Aligned
C5 — Correspondence Theory of Truth: Aligned
C6 — Moral Realism: Aligned
Dissolution Finding: Non-Applicable (C1 and C2 Non-Operative)
Step 5 — Analytical Note
Huemer is unusual in the CPA record. Most figures in the register are political actors, public intellectuals, or moral philosophers whose commitments on C3–C6 must be reconstructed from the presuppositional layer beneath explicit argument. Huemer’s positions on C3–C6 are his explicit argument. The audit does not reconstruct what he must hold; it confirms what he openly holds and shows that his explicit commitments are load-bearing in precisely the sense the instrument requires.
The four Aligned findings constitute a coherent philosophical package. C6 (moral realism) supplies the objective moral facts. C5 (correspondence theory) specifies what it means for a claim about those facts to be true or false. C3 (ethical intuitionism) establishes the epistemic route by which rational agents access those facts directly. C4 (foundationalism) supplies the structural account of how intuitive moral knowledge functions as the non-inferential base for the rest of moral epistemology. These four commitments do not merely coexist in Huemer’s record — they are mutually load-bearing. Each commitment’s claim requires the others to stand.
The cultural displacement thesis is a finding of particular note for this project. Huemer argues that intuitionism fell from professional favor not through decisive refutation but through cultural and personal biases operating before argument — biases that shape which theories receive sympathetic investigation and which arguments seem plausible. This is structurally identical to the framing this project applies to the six commitments as a class: all six are minority positions in contemporary analytic philosophy, displaced through institutional processes and professional fashion rather than philosophical defeat. Huemer offers the intuitionist case as an example of the general pattern; this project treats the pattern as comprehensive across the full set of commitments.
The Non-Operative findings on C1 and C2 are a genuine source limitation. Huemer’s philosophical record includes work bearing on consciousness and political philosophy that may carry presuppositions on these commitments. Nothing in this document resolves the question. A full-record CPA remains possible and would complete the profile.
Instrument: Classical Presupposition Audit (CPA) v1.0. Instrument architecture: Dave Kelly. Theoretical foundations: Grant C. Sterling’s corpus. Source: Michael Huemer, “Apology of a Modest Intuitionist,” Philosophy and Phenomenological Research, Vol. LXXVIII No. 1, January 2009. Prose rendering: Claude (Anthropic), 2026.

