The thesis presents a development of J. L. Austin's analysis of truth and its accompanying analysis of sentence structure. This involves a discussion and refinement of Austin's notions of the demonstrative and descriptive conventions of language and of the demonstrative and descriptive devices of sentences. The main point of the thesis is that ordinary language must be treated as an historical phenomenon: one that has evolved its more complex features through a long series of variations upon a small number of rudimentary conventions and locutions. The utility of Austin's analysis is shown to lie in the description that it provides of the functions of these rudimentary conventions and locutions. The analysis is used to illuminate a number of problematic sentences and expressions of ordinary language, including identity sentences, definite descriptions, existential sentences, and conditionals.

This thesis investigates Plato's analogy between virtue and crafts, a comparison made extensively in the early dialogues. I first detail the model of technical knowledge that Plato uses as a paradigm of knowledge. An application of this model shows the inadequacies in some claims to know or to teach virtue. Applying the model to the Socratic dictum, 'Virtue is knowledge' enables us to understand what such knowledge is about. Such knowledge is identified as 'self-knowledge' and is the product of philosophy. Philosophy is thus revealed as the craft of virtue, directed at the good of individuals. One problematic aspect of the analogy between virtue and crafts is the possibility of misuse. Virtue conceived as self-knowledge enables Plato to explain both why such a craft cannot be misused and why it alone can be the basis for benefiting others.

This inquiry suggests a new epistemological foundation for understanding and discernment in biomedical ethics. This foundation, based on Aristotle's phronesis or practical wisdom, contains elements of the lived human experience which are seen as essential aspects of ethical, as well as medical, deliberation. The Aristotelian intellectual virtues of theoria and phronesis, used as "ideal types" of rationality, provide epistemological prejudices that structure two distinct ways of thinking. With this distinction, an alternative to certain dominant trends within biomedical ethics arises as phronesis provides more human centered prejudices for understanding. In conclusion, we shall see, using the doctrine of informed consent, that a phronetic rationality allows different, more humane meanings to come into being. Phronesis, it will be argued, provides a mode of rationality which promotes compassion and engagement in both ethics and medicine and consequently, is the more appropriate way of thinking in these important human practices.

This dissertation seeks to fill two lacunae in contemporary feminist discussions of essentialism: first, a lack of critical analysis of the term "essentialism" and its cognates, and second, a paucity of feminist work that aims to develop anti-essentialist methods rather than merely presenting anti-essentialist critiques of existing feminist theories. I propose a typology of feminist essentialisms, distinguishing metaphysical, biological, linguistic, and methodological variants. I argue that methodological essentialism---understood as the practice of making false generalisations about women based on the experiences and identities only of a particular group---is the most pressing political issue for feminists, and defend Elizabeth Spelman's anti-essentialist critique against its opponents. Anti-essentialism should not, however, be interpreted as disavowing the category "women" altogether, and I use Ludwig Wittgenstein's arguments in his Philosophical Investigations to articulate a form of feminist anti-essentialism. that understands similarities between women as family resemblances. This approach enables feminists to make generalisations about women that neither obscure important differences nor deminise our political efficacy. This Wittgensteinian feminism rejects the a priori and urges us to "look and see" to justify generalisations about women. I interpret this as a call for a feminist anti-essentialism that is embedded in feminist practice, and ask what "look and see" might mean for feminist research and for feminist organising against sexual violence. In chapter four, I argue that Carol Gilligan's recent work on girls' psychology in the context of race and class differences successfully responds to long-standing charges that her research is essentialist. It does not, however, fully meet the methodological challenge of anti-essentialism as it fails to acknowledge power relations embedded in research processes, which in turn shape conclusions about female identi

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In order to understand the implications of Frege's Grundlagen der Arithmetik, we must bear in mind that Frege saw logic as an overarching discipline, necessary for all scientific enquiry. This consideration allows us to make sense of his logicism, the idea that arithmetic is embedded in logic, and his platonism, the commitment to the mind-independent nature of arithmetic objects, such as numbers. In 1902, Russell generated a paradox from Basic Law (V), found in the first volume of Grundgesetze, which suggested that Frege's entire logical system was inconsistent. Recent work by Boolos and Wright, have fenced off the damage and shown that the bulk of Frege's work is consistent. I shall argue, however, that their proposed solutions prove unsatisfactory with respect to Frege's view of logic and especially his logicism.

Nietzsche urges us not to embrace any one perspective of the world, at the same time as he vociferously and repeatedly attacks whole ways of life. These two aspects of Nietzsche's work seem to be in tension with one another--what perspective allows Nietzsche to be so opinionated? Nietzsche insists that all experience is from a perspective and that there is no inherently privileged perspective. This is the "perspectivist" Nietzsche that Derrida focuses on. Yet not only does Nietzsche insist on denigrating the perspective of others, he seems to acknowledge that such attacks are not very worthwhile if they too are just from another perspective. Thus thinkers like Schacht argue that there is a privileged perspective in Nietzsche, and that this privilege is unique because of the relationship it has with the "natural" and the "healthy." The Gay Science presents a Nietzsche who integrates these two seemingly incompatible positions, for in this work Nietzsche makes an exciting synthesis possible through the idea of the eternal recurrence and through his attack on the unitary self. Nietzsche urges us to create ourselves as affirmers, but the stance of affirmation is not in itself a perspective; rather, a central characteristic of affirmers is the ability to embrace numerous perspectives.

This thesis investigates how users contribute to wiki environments implemented in higher education settings. The type, extent and quality of users' edits is assessed by analyzing a student-generated wiki through a manual analysis carried by three raters. This project aims to present the relative contribution of wiki users as a way to motivate them to collaborate in a wiki-based group project. Manual as well as automatic programs are used to analyze the same set of wiki articles. Automatic algorithms are proposed to estimate users' relative contribution and ownership to the article. Suggested is the implementation of a visual representation known as a glyph (working as an add-on to the wiki) that shows statistics on participants contributions. Several glyph designs were tested by participants through interviews. These interviews showed that participants identified the visualization as a motivation enhancer to contribute to wikis.

Within recent political theory, political liberalism has answered the question of how to deal with pluralism in contemporary society largely in terms of tolerance. Prompted by the same question, agonistic political theory has been in search of a way to move beyond liberal invocations of tolerance to a deeper celebration of difference. This project tells the story of the move within political theory from tolerance to difference, and the concomitant move from epistemology to ontology, through an exposition of the work of liberal theorists John Rawls and Richard Rorty and of agonistic, or post-Nietzschean, political theorists Chantal Mouffe and William Connolly. From a theological perspective, the ontological turn within recent theory can be seen as a welcome development, as can the desire to expand our capacity to engage with difference and to augment our current political imagination given contemporary conditions of pluralism. Yet the sufficiency of the answers and ontology put forward by both political liberalism and post-Nietzschean political thought needs to be seriously questioned. Indeed, the ontological turn in political theory opens the way for a theological turn, for theology is equally concerned with questions of human being and 'what there is' more generally. To make this 'theological turn,' I look to Saint Augustine, and the ontology disclosed though his writings, to see what theological resources he offers for an engagement with difference. Through this discussion we re-discover Augustine's Heavenly City as the place in which unity and diversity, harmony and plurality can come together in ways that are not possible outside of participation in the Triune God. Yet this does not mean that the Heavenly City is to take over the earthly city. By putting Augustine into conversation with more recent theologians such as John Milbank, Karl Barth, and William Cavanaugh, we consider the relationship between the Heavenly City and the earthly city and we offer a picture in which renewed and expanded conceptions of 'public' and 'conversation' open the way for rich engagement between the many different particularities that constitute a pluralist society.

This thesis seeks to examine and critique the transcendental feminist methodology and Trinitarian theology of Elizabeth A. Johnson. We will focus on four central, recurring themes that emerge out of her corpus, paying particular attention to how she assimilates these in She Who Is. They are: Johnson's feminist methodology and epistemology, her transcendental anthropology and epistemology, her panentheistic, relational ontology and her feminist 'Trinitarian' God-talk. The thesis will consist of four chapters, which will focus on these four main themes, and a conclusion. Chapter one will look specifically at the Johnson's modern, Catholic reformist feminist methodology and epistemology, which prioritise both the category of experience and the ontological principle of relation. The chapter will conclude with a brief summary of a few feminists who have defined their theological positions in direct opposition to Barth's view of Trinitarian revelation and language, and compare them to Johnson. Chapter Two will deal specifically with Johnson's embrace of Karl Rahner's transcendental metaphysics and her attempt to integrate this anthropology and ontological epistemology with feminist anthropology and epistemology. We will also highlight the various 'dilemmas of difference' Johnson faces in her use of conflicting appeals to experience. Chapter Three will analyse and critique her panentheistic, relational ontology with specific attention paid to her re-schematization of traditional Trinitarian theology and Christology. Barth's theology is used in part to critique Johnson's assertions at this point. In Chapter Four, we analyse Johnson's 'analogical' and 'symbolic' approach to God-talk to determine whether it is safeguarded from univocity, as she intends. We also raise-the question of whether she is kept from the potential equivocity that threatens her agnostic approach. In conclusion, we will summarise our response to the naturally emerging questions of the thesis, assess Johnson's approach overall and raise whatever questions we believe still remain.