Schwitzgebel's Unreliable Introspection, Indeterminate Boundaries, Metaphysical Humility

Philosopher Eric Schwitzgebel holds that phenomenal consciousness is real and irreducible, while denying two assumptions almost universally made about it: that introspection gives reliable access to it, and that it has determinate boundaries. He defends phenomenal consciousness "innocently"—by pointing at uncontroversial positive and negative examples rather than by theoretical definition—then argues that our judgments about our own ongoing experience are so error-prone that consciousness science lacks a trustworthy evidence base (Schwitzgebel, 2011, 2016). Separately, he argues consciousness is a vague property admitting genuinely indeterminate cases, so that for some systems it is neither determinately true nor determinately false that there is something it is like to be them (Schwitzgebel, 2023). The combined position is not a theory of what consciousness is but a set of constraints on what any theory can responsibly claim, culminating in the thesis that every available account of the mind-cosmos relation is bizarre and none compels rational assent (Schwitzgebel, 2024).

In other words, Schwitzgebel’s approach to phenomenal consciousness combines robust realism about experience with unusually strong skepticism about our ability to know its structure, distribution, and metaphysical basis. Phenomenal consciousness—the occurrence of sensory experiences, imagery, emotions, dreams, thoughts, and other states for which there is something it is like—is real and should not be defined away, yet introspection is substantially less reliable than philosophers commonly assume, consciousness may admit genuinely borderline cases, and current theories provide surprisingly weak grounds for deciding which nonhuman, artificial, or collective systems are conscious (Schwitzgebel, 2008, 2011, 2016, 2023). The resulting position is less a mechanism of consciousness than a distinctive epistemological and metaphysical framework: phenomenal realism joined to introspective fallibilism, ontological indeterminacy at consciousness’s boundaries, and deep agnosticism about its ultimate nature.

Phenomenal Realism Without Metaphysical Inflation

Schwitzgebel rejects attempts to define phenomenal consciousness in ways that prejudge its metaphysics. Rather than building irreducibility, privacy, infallible acquaintance, intrinsic properties, or nonphysicality into the concept, he favors definition by paradigmatic examples. Seeing colors, feeling pain, undergoing vivid emotion, imagining sounds, dreaming, and consciously thinking are positive cases; growth-hormone regulation, standing dispositional knowledge, and unconscious sensory processing are negative cases. Phenomenal consciousness is whatever the positive cases share and the negative cases lack., whatever obvious feature unifies the former and distinguishes them from the latter (Schwitzgebel, 2016).

This produces what might be called minimal or “innocent” phenomenal realism. Conscious experience plainly exists, but acknowledging it commits one neither to dualism nor to the claim that qualia are scientifically inexplicable. Against strong illusionism, Schwitzgebel maintains that denying phenomenal consciousness risks losing the very phenomenon the debate is supposed to explain. Against some phenomenal realists, however, he resists inferring a substantive ontology merely from the manifest presence of experience.

This makes him a realist about phenomenality, and he argues eliminativists gain plausibility only by defining consciousness in an inflated way no realist need accept (Schwitzgebel, 2024). But defining a term by example buys clarity about which phenomenon is at issue while settling nothing else about it. Pointing at a set of cases does not establish that they share a single underlying nature, that the line between them and the negative cases is sharp, or that introspection reliably tells us what falls on either side. Schwitzgebel treats all three as open questions, and answers two of them negatively: the line is not sharp, and introspection is not reliable. On whether phenomenal consciousness is a natural kind, he is agnostic.

The Unreliability of Introspection

Perplexities of Consciousness assembles the case that we are, in his phrase, singularly inept at judging our own experience (Schwitzgebel, 2011). The evidence is largely historical and phenomenological. Educated Americans in the mid-twentieth century confidently reported dreaming in black and white; after color television, they reported dreaming in color—an inconsistency that cannot plausibly be explained by change in dream phenomenology and that suggests reports track cultural models (Schwitzgebel, 2002). Reports on visual imagery have varied wildly across observers and eras since Galton. Whether one has constant tactile experience of one's feet in one's shoes, whether peripheral vision is richly detailed or sketchy, whether emotional experience has a determinate felt quality at a given moment: on each, careful reporters disagree, and no one has a principled method for adjudicating.

His diagnosis is that attention to experience is unstable, and judgments made under unstable attention are unreliable. The consequence is methodological rather than metaphysical: if first-person reports are the primary data against which theories are tested, and those reports are systematically untrustworthy about their own subject matter, the field's evidence base is weaker than its confidence suggests. Critics press that the argument overreaches—that the failures are domain-general rather than specific to introspection (Smithies, 2013; Spener, 2013).

Borderline Consciousness and the Quadrilemma

Schwitzgebel's most distinctive metaphysical claim is that consciousness admits borderline cases: states and systems for which experience is neither determinately present nor determinately absent (Schwitzgebel, 2023). The argument is a quadrilemma. Across the apparent continuum of Earthly systems, either almost nothing is conscious, or everything is, or there is a sharp boundary somewhere along it, or consciousness is vague. Extreme sparseness and extreme abundance are both implausible; a sharp boundary requires that some minute difference—one synapse, one degree of integration—flip experience from wholly absent to wholly present, which no naturalistic theory can explain. Vagueness follows.

The standard objection is that borderline consciousness is inconceivable: one cannot imagine what it would be for there to be sort-of-something-it-is-like. Schwitzgebel replies that this rests on an inappropriately demanding standard of conceivability, and that failing to imagine indeterminate phenomenality is unsurprising given that we equally fail to imagine determinate phenomenality in unfamiliar systems. One outcome would be that debates over animal consciousness, consciousness without attention, and anesthetic emergence need not be forced into a binary. His treatment of the garden snail—a creature with a visual system, associative learning, and no clear verdict available—is offered as a case where the honest answer may be that there is no determinate answer (Schwitzgebel, 2020).

Universal Bizarreness, Universal Dubiety, Metaphysical “Crazyism”

The two strands converge in a metaphilosophical position Schwitzgebel calls “crazyism”: on fundamental questions about mind and cosmos, something bizarre must be true, and we cannot know which or what (Schwitzgebel, 2014, 2024). Universal Bizarreness holds that every possible theory of the mind-cosmos relation defies common sense; Universal Dubiety holds that none compels rational belief. The result is “metaphysical crayism.”

His argument that materialism plausibly entails that the United States is conscious is deployed as a demonstration—set aside morphological prejudice against spatially distributed entities, and the United States has the properties materialists standardly treat as sufficient: people, communication networks, memory stores, self-monitoring processes, and coordinated behavior. Schwitzgebel does not assert that the United States is conscious; he uses the case to demonstrate how seemingly plausible theories generate counterintuitive consequences. Schwitzgebel argues that either materialists must accept group consciousness, or they must identify a principled exclusion, and, he states, none is forthcoming (Schwitzgebel, 2015).

This supports his broader “crazyism”: every sufficiently developed metaphysics of mind may entail something radically contrary to common sense, while current evidence and argument fail to establish which strange option is correct. Materialism, dualism, panpsychism, idealism, and other views all yield bizarre consequences when systematically developed (Schwitzgebel, 2014).

Assessment

While Schwitzgebel offers no mechanism, no neural criterion, and no positive account of how phenomenality arises, and he would regard the absence as honest and optimal. Rather, he reshapes what needs to be explained and the epistemic standards governing theories of it. What he supplies is a pair of constraints most theories violate silently: introspective data are weak evidence, and theories predicting sharp cutoffs owe an account of where and why. The borderline argument has particular critique for integrated information theory, global workspace theory, and higher-order theories alike, each specifying conditions that appear to admit of degree while treating consciousness as present or absent.

The objections to Schwitzgebel are equally clear. The unreliability case rests substantially on historical variation in reports, which underdetermines whether the experiences or only the descriptions varied. Borderline consciousness faces the charge that indeterminacy in our concept has been mistaken for indeterminacy in the world—semantic rather than metaphysical vagueness. Critics have argued materialists can deny group consciousness on principled grounds (Kammerer, 2015).

Nonetheless, Schwitzgebel has four claims that together are distinctive: phenomenal consciousness is real without requiring metaphysical inflation; introspection of phenomenology is deeply fallible; consciousness may possess genuinely indeterminate boundaries; and available metaphysical theories remain radically underdetermined, particularly when extended beyond ordinary adult humans.

References

Kammerer, F. (2015). How a materialist can deny that the United States is probably conscious—response to Schwitzgebel. Philosophia, 43(4), 1047–1057.

Schwitzgebel, E. (2002). Why did we think we dreamed in black and white? Studies in History and Philosophy of Science Part A, 33(4), 649–660.

Schwitzgebel, E. (2008). The unreliability of naïve introspection. The Philosophical Review, 117(2), 245–273.

Schwitzgebel, E. (2011). Perplexities of Consciousness. MIT Press.

Schwitzgebel, E. (2014). The crazyist metaphysics of mind. Australasian Journal of Philosophy, 92(4), 665–682.

Schwitzgebel, E. (2015). If materialism is true, the United States is probably conscious. Philosophical Studies, 172(7), 1697–1721.

Schwitzgebel, E. (2016). Phenomenal consciousness, defined and defended as innocently as I can manage. Journal of Consciousness Studies, 23(11–12), 224–235.

Schwitzgebel, E. (2020). Is there something it's like to be a garden snail? Philosophical Topics, 48(1), 39–64.

Schwitzgebel, E. (2023). Borderline consciousness, when it's neither determinately true nor determinately false that experience is present. Philosophical Studies, 180(12), 3415–3439.

Schwitzgebel, E. (2024). The Weirdness of the World. Princeton University Press.

Schwitzgebel, E., & Hurlburt, R. T. (2007). Describing Inner Experience? Proponent Meets Skeptic. MIT Press.

Schwitzgebel, E., & Nelson, S. R. (2023). Introspection in group minds, disunities of consciousness, and indiscrete persons. Journal of Consciousness Studies, 30(9–10), 288–303.

Smithies, D. (2013). On the unreliability of introspection. Philosophical Studies, 165(3), 1177–1186.