The present dissertation concerns cognitive psychology—theories about the nature and mechanism of perception and thought—during the High Middle Ages (1250–1350). Many of the issues at the heart of philosophy of mind today—intentionality, mental representation, the active/passive nature of perception—were also the subject of intense investigation during this period. I provide an analysis of these debates with a special focus on Durand of St.-Pourçain, a contemporary of John Duns Scotus and William of Ockham. Durand was widely recognized as a leading philosopher (...) until the advent of the early modern period, yet his views have been largely neglected in the last century. The aim of my dissertation, then, is to provide a new understanding of Durand’s cognitive psychology and to establish a better picture of developments in cognitive psychology during the period. -/- Most philosophers in the High Middle Ages held, in one form or another, the thesis that most forms of cognition (thought, perception) involve the reception of the form of the object into the mind. Such forms in the mind explain what a given episode of cognition is about, its content. According to what has been called the conformality theory of content, the content of our mental states is fixed by this form in the mind. Durand rejects this thesis, and one of the primary theses that I pursue is that Durand replaces the conformality theory of content with a causal theory of content, according to which the content of our mental states is fixed by its cause. When I think about Felix and not Graycat, this is to be explained not by the fact that I have in my mind the form of Felix and not Graycat, but rather by the fact that Felix and not Graycat caused my thought. -/- This is both a controversial interpretation and, indeed, a controversial theory. It is a controversial interpretation because Durand seems to reject the thesis that objects are the causes of our mental states. In the first half of the present dissertation, I argue that Durand does not reject this thesis but he rejects another nearby thesis: that objects as causes give to us ‘forms’. On Durand’s view, an object causes a mental state even though it does not give to us a new ‘form’. In the second half of the dissertation I defend Durand’s causal theory of content against salient objections to it. (shrink)

Ontologies are some of the most central constructs in today's large plethora of knowledge technologies, namely in the context of the semantic web. As their coinage indicates, they are direct heirs to the ontological investigations in the long Western philosophical tradition, but it is not easy to make bridges between them. Contemporary ontological commitments often take causality as a central aspect for the ur-segregation of entities, especially in scientific upper ontologies; theories of causality and philosophical ontological investigations often go hand-in-hand, (...) and were essentially inseparable in medieval thought. This constitutes the foundation for a bridge, and this article analyzes the causality-based ontology of the late medieval philosopher Dietrich of Freiberg from the viewpoint of today's upper-ontology engineering. In this bridging attempt, it offers a translation into English of the first part of Dietrich's De origine (abbreviated title) that is a compromise between traditional scholarly translations of medieval Latin philosophical texts and contemporary ontology. (shrink)

The traditional reading of Hume is that he is a regularity theorist about causation and a compatibilist on the issue of human freedom and moral responsibility. I argue that these readings are mutually exclusive---i.e. endorsement of the one entails the rejection of the other---as they diverge on a fundamental premise, namely, the truth of causal determinism. Relatively recent "New Hume" scholarship has claimed that he is a causal realist---i.e. that he believes in the objective existence of necessary connections or causal (...) powers. I argue against this "new" reading and offer analysis in support of one type of the traditional regularity strain. The main claim I wish to establish is that the misguided compatibilist attribution derives from the illegitimate bifurcation of Hume's necessity and liberty arguments on the part of commentators on both sides of the dispute, a bifurcation which distorts and invariably undermines Hume's 'reconciling project'. In other words, Hume's redefinition of the terms of the free will debate rules out the standard compatibilist reading, as Hume is not presupposing, or even concerned with, the truth of determinism; rather, he is concerned with the psychology of our subjective experience of necessity, i.e. with how and why necessity proves essential to human experience or to human nature. Specifically, I argue that Hume's treatment of necessity may be best understood as pointing to pragmatic considerations: his ultimate concerns are the ways in which our experience of necessity serve us in the way of prediction, predictability, and/or the ability to predict natural events, including human actions and choices. This line of thought is especially clear in Section 7 'Of Liberty and Necessity' of An Inquiry Concerning Human Understanding, while the psycho-subjective aspect constitutes the focus of Hume's discussion of necessary connections in the Treatise. What is clear from a survey of each of these texts is that Hume's treatment of necessity is not to be confused with a compatibilist's causal determinist account of the same. (shrink)