Sunday 19 August 2012

Fodor, Aristotle, and the modular mind


I mentioned some time ago, when discussing Daniel Stern’s attempt at tracing meaningful interpersonal interactions, that there is a convenient way to bypass the knotty problem of how representations - or what ”comes in” - obtain meanings that can be expressed by referential, or symbolic, means. You just ignore the divide and concentrate on either side. Because Stern did not want to do this, he crashed into the problem. His effort to solve it demonstrate that a number representational modes must be assumed and, specifically, one that allows for the transition. Stern called it “proto-narrative envelope”. To me, this construction is not entirely convincing.

Disregarding the number and nature of representational modes that make up our experience of the world, the other problem is the number of mental faculties that must be postulated  to account for the incoming information. Stimulated by Ibn Sina’s Medieval account of the five faculties inthe perceptual soul, I left the issue of meaning for a while and began reading Jerry Fodor’s and Peter Carruthers’ views of mind modules. What an interesting world of thought it is. As a psychotherapist being inspired by Lev Vygotsky, Valentin Voloshinov, Mikhail Bakhtin, and Donald Winnicott, I left behind the cognitive approaches to the mind in the early 1970s. Hence, the more philosophical discourse on  the computational models of the mind is a foreign territory to me and I have to proceed cautiously.

Both Fodor and Carruthers subscribe to the assumption on multiple functions, or modules, that mediate between the flow of sensory input and the mind. Their main difference seems to be in the level and extent of such modules. Fodor claims that the central (computational) processes are non-modular, while Carruthers supports a “massive modularity” theory of the mind. Both share the view that mental modules are innate, hard-wired systems that operate according to their inner rules.

Interestingly, when Fodor published his seminal book “The modularity of mind” (1983), he added “An essay on faculty psychology” as the subheading. Indeed, within the Aristotelian framework of how the mind relates to the world there is logically no alternative.  Although written almost thirty years ago, Fodor’s book is a relevant work that introduces the modern version of the ancient model of understanding the soul’s operations. Here is an illustration how Fodor approaches the issue of incoming forms:

Any mechanism whose states covary with environmental ones can be thought of as registering information about the world; and, given the satisfaction of certain further conditions, the output of such systems can reasonably be thought of as representations of the environmental states with which they covary … But if cognitive processors are computational systems, they have access to such information solely in virtue of the form of the representations in which it is couched. Computational processes are, by definition, syntactic; a device which makes information available to such processes is therefore responsible for it format as well as its quality… if we think of the perceptual mechanisms as analogous to such devices, then we are saying that what perception must do is to so represent the world as to make it accessible to thought. ” (Fodor: The modularity of mind, pp. 39-40, original italics).

It is not easy to unpack this statement. In fact, the whole book is an elaboration of this basic formulation. For the time being, I only pay attention to the first and the last sentences in the passage. Aristotle’s view of the co-varying mechanism covered the sense organs and the internal common sense, whose joint operation produced phantasmata as the output, in a mode that was accessible to thought. This analogue does not do justice to Fodor because, elsewhere, he explicitly rejects the “resemblance theory” of mental representations. 

True, since Descartes representations could not anymore be conceived of as “forms without matter”. The division between “res extensa” and “res cogitans” implied a radical transformation from the material to the ideal mode of existence. The concept of representation has indeed changed a lot. However, the notion of sensory processes that  covary with external states, register information about the world, and present this information to thought, faithfully repeats the ancient model of the mind.