Returning to the theme of transcendental arguments once again, why is it that these arguments have taken the form of a transcendental idealism rather than a transcendental realism. Recall the basic form of transcendental arguments as nicely articulated in the Internet Encyclopedia of Philosophy. Transcendental arguments…
…characteristically center on a claim that, for some extra-mental proposition P, the indisputable truth of some general proposition Q about our mental life requires that P.
Thus, for example, we indisputably make causal judgments (proposition Q). Judgments of necessity or causal judgments cannot be derived from sensation. Therefore, there must be a category of causation in our mind that functions as the condition for the possibility of making these judgments. I develop this line of argument in more detail here.
Now, the question I am asking is why mental life, consciousness, mind, language, society, or communication is being granted a special privilege in these arguments? I suspect that the answer lies in some thesis about the immanence of mind to itself. In other words, we locate these transcendental conditions in mind (or language, or communication, or perception, or the social) because we implicitly hold that we have direct access to these domains whereas we do not have direct access to objects transcendent to us.
However, if the last 300 years of philosophy have shown us anything, it has shown us that we do not have any direct or immanent or immediate access to our own minds. As Lacan liked to say, following Freud, the subject is split. This is true even in Kant, as can be seen in both the paralogisms and the the deduction where Kant distinguishes between the subject as phenomena to itself, the transcendental unity of apperception, and the subject in-itself. Similarly, phenomenology increasingly discovered just how elusive givenness is in intuition, or how there is no immediacy in consciousness.
Yet if we follow through the implications of these points, then it would seem that there’s no reason to privilege mind (or some variant thereof) in our transcendental arguments. In other words, all things being equal, why is it less plausible to argue for a transcendental realism? Rather than inferring a category of causality in the mind when noting the indisputable fact that we make causal judgments. Why not instead point to the indisputable fact that things change and therefore this change must have a cause? Inquiring minds want to know.