Mario De Caro

In this paper, we first set out three requirements that each e-theory – a theory whose task is to explain data – must fulfill in order to be one such good theory: i) an ontological requirement, i.e. adequate simplicity, ii) a methodological requirement, i.e. plurality of research procedures, iii) an epistemological requirement, i.e. compatibility with the best available epistemical procedures. Moreover, we will claim that from the metaphilosophical point of view, unlike scientific naturalism on the one hand and supernaturalism on the other, liberal naturalism is the only philosophical approach capable of fulfilling all such requirements.

According to a widespread view, a complete explanatory reduction of all aspects of the human mind to the electro-chemical functioning of the brain is at hand and will certainly produce vast and positive cultural, political and social consequences. However, notwithstanding the astonishing advances generated by the neurosciences in recent years for our understanding of the mechanisms and functions of the brain, the application of these findings to the specific but crucial issue of human agency can be considered a “pre-paradigmatic science” (in Thomas Kuhn’s sense). This implies that the situation is, at the same time, intellectually stimulating and methodologically confused. More specifically—because of the lack of a solid, unitary and coherent methodological framework as to how to connect neurophysiology and agency—it frequently happens that tentative approaches, bold but very preliminary claims and even clearly flawed interpretations of experimental data are taken for granted. In this article some examples of such conceptual confusions and intellectual hubris will be presented, which derive from the most recent literature at the intersection between neurosciences, on the one hand, and philosophy, politics and social sciences, on the other hand. It will also be argued that, in some of these cases, hasty and over-ambitious conclusions may produce negative social and political consequences. The general upshot will be that very much has still to be clarified as to what and how neurosciences can tell us about human agency and that, in the meantime, intellectual and methodological caution is to be recommended.

The article discusses the proposals for replying to the skeptical challenge developed by the so-called Neo-mysterians, and more particularly by the most eloquent of them, Colin McGinn. McGinn’s version of mysterianism, which he labels “Transcendental Naturalism,” is a very candid and rigorous form of scientific naturalism since (contrary to the standard naturalistic views) it is prepared to concede both that the attempts to reduce philosophically controversial phenomena – such as knowledge, free will, consciousness, meaning and the self – do not work and that those phenomena cannot be eliminated from our worldview. But McGinn is criticized nonetheless since he concludes from such irreducibility and ineliminability that, for our species at least, philosophical riddles will always remain unsolvable “mysteries.” It is argued that a much more plausible conclusion would be to question the legitimacy of some of the premises from which McGinn draws his “mysterian” conclusion. More specifically, it is claimed that McGinn’s thesis that genuine explanations have to have a bottom-up, aggregative format is an unreasonable one.