naturalismWhen I reflect on the debates that have recently unfolded surrounding epistemology, ethics, Kant, correlationism, and realism, I think they all spin on whether or not the philosopher begins from a naturalistic perspective. The Kantian and correlationist positions are basically descendants of Descartes’ philosophical methodology. Even though, for example, they don’t begin in the way Descartes did in the first two meditations, the implicit thesis is that we share an immediate and therefore apodictic or certain relationship to our consciousness, and therefore must begin with the analysis of consciousness prior to any claims about the world. Since our relationship to external objects consists of representations in the mind, and since hallucinations are always possible or we could be dreaming, we cannot begin by simply jumping haphazardly into claims about the nature of the world because we could be mistaken or merely making speculative claims.

The position of the linguistic correlationist is similar. Rather than treating consciousness as the immediate, the linguistic correlationist begins from the premise that since our relationship to ourselves, others, and the world around us is mediated by language, we must first begin with the analysis of language. Thus, for example, were Paul Churchland to point out to Lacan certain phenomenon pertaining to the brain with respect to schizophrenics (for example that they have much higher concentrations of dopamines), Lacan would respond by pointing out that in order for Churchland to investigate the brain he must frame his observations, experiments, etc., in signifiers. Again, the structure of the argument is the same. In both cases, the case of the correlationist that begins with consciousness and the case of the correlationist that begins with language, something is asserted as immediate and something else is posited as being mediated and therefore uncertain. Since the latter is categorized as uncertain by virtue of its status as mediated, it thereby is excluded from philosophical discourse such that it can no longer function as a ground.

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The naturalist has a very different conception of where to begin. First, unlike the ant-realist, the naturalist does not begin from the premise that the ideal of knowledge is certainty, but rather probability. In other words, naturalist claims about knowledge are much weaker in terms of what they assert than are many anti-realist claims. In Husserl we find the word apodictic all over the place and the claim that we must disclose or discover the apodictic grounds of knowledge. For the naturalist this is fine for mathematics and deductive logic which is very likely composed of analytic truths, but it doesn’t fair very well with respect to knowledge claims about the world. I am reasoning well when I conclude that the peeked person I see sneezing, wiping their nose, etc., very likely has a cold, but I could subsequently discover they have allergies as new information becomes available.

Second, and perhaps more importantly, the naturalist is skeptical about the accuracy of our introspective claims about our mental life and descriptions of our experience of the world. Familiar with a number of findings from cognitive science, the naturalist is aware that often our descriptions of our conscious states are wildly at odds with what is actually going on. For example, an experimental psychologist might place a number of identical red sweaters on a table in a store and then observe which sweaters people select. Much to his surprise, the buyers disproportionately choose sweaters from the right side of the table. When asked later why they chose the sweaters from the right side of the table, the people generally say that something about the sweaters on the right side of the table was better than the other sweaters, despite the fact that there was no difference between the sweaters. In other words, their first person reports of what they are doing often evoke reasons deeply at odds with what is cognitively going on.

Finally, third, the naturalist begins from the standpoint of naturalism not because it is apodictic or certain, but because so far it has been the most successful hypothesis in allowing us to understand our world and the nature of our being. Given the success of this hypothesis, the naturalist thus begins from the premise that we should work from the thesis that claims about our thought, ethical deliberation, etc., must at the very least be consistent with our biology, our current understanding of the physical world, etc. In other words, when the Kantian outlines the conditions for knowledge and the structure of the transcendental subject, the cautious naturalist says not so fast. Beginning from the premise that dualism is false– a thesis that has massive evidentiary support –the naturalist will point out that any claims that we make about the transcendental subject must be consistent with what we know about neurology for the most probable hypothesis is that mind and brain are identical. Evaluating Kant’s categories, his claims about pure intuition, his claims about reason, etc., will thus become an empirical claim requiring us to determine whether or not our neurology and cognitive experience actually works in the way described. The lion’s share of evidence strongly suggests that the answer to this question is no.

In treating such questions as empirical questions, the anti-realist will protest that the naturalist has missed the point and that he is merely outlining the necessary and sufficient conditions for knowledge to be possible. That is, Kant is outlining the normative conditions structuring knowledge. But again, this argument fails to hold up under scrutiny. As a friend once said to me, wishing does not make it so. You might not be able to see how knowledge is possible if this transcendental structure is not there, but if that transcendental structure is inconsistent with our best findings in neurology and cognitive science, then the most reasonable course of action is to abandon that model and go back to the drawing board. If our transcendental accounts is inconsistent with what our best neurology tells us about how moral reasoning takes place, then that transcendental account must be abandoned. I think, at the end of the day, the moral of the story is that there are no shortcuts. We cannot sit in an armchair engaging in a transcendental or phenomenological reduction with the assurance that we will be able to derive an accurate understanding of our minds and how we experience the world. No, we must do the hard empirical work (or at least be aware of findings in these fields) of determining how our neurology works. By all means, ask how ethics is possible, how mathematics is possible, how logic is possible, etc., but begin from the premise that these things have a biological base that cannot be ignored and that we do not have a priori knowledge of that base.