Abstract

About halfway through the twentieth century, it became a fairly common practice amongst philosophers and psychologists to speculate about the procedures whereby human beings might come to understand one another's speech in what have come to be known as the circumstances of "radical interpretation." Writers belonging to this tradition shared a common curiosity about how understanding of a human language might be achieved by an investigator to whom that language was more or less totally unfamiliar. Philosophers such as W. V. O. Quine, Donald Davidson, John McDowell and Christopher Peacocke have made use of speculations about this sort of situation to argue for the existence of a general "rationality constraint" upon the methods of linguistic interpretation. According to these authors, an agent is not to be counted as the speaker of a genuinely meaningful, interpretable human language unless that agent may also be taken to be capable of exhibiting at least some minimal level of rationality in his thought and in his actions. ;Over the course of the dissertation I provide a detailed investigation of the notion of "rationality" as it is used by philosophers in this tradition. I divide philosophers who have written on the epistemology of radical interpretation into two schools of thought, distinguishable on the basis of their reliance upon either empiricist or rationalistic presuppositions about how knowledge is acquired in the human sciences. I then proceed to catalogue the shortcomings of each of these two quite different approaches to interpretational methodology, in something like the spirit of Kant's Prolegomena To Any Future Metaphysics. The principal positive conclusion that I arrive at as the result of these inquiries is that the only way of avoiding outright skepticism in our understanding of the methods whereby linguistic understanding is achieved by the so-called 'radical' interpreter is to adopt a distinctively Peircean notion of rationality. According to this notion, the truly rational agent is one whose methods of inquiry approximate those of an individual who is in possession of complete information about the natural world