In spite of all the industrious efforts Peirce scholars have made so far, Peirce’s biography still retains a number of gaps, among which the problem of identity of Peirce’s second wife, Juliette Froissy, stands out most significantly. It is all the more important that, as some scholars suggest, the discovery of any reliable facts about Juliette could provide an explanation to some of the decisions Peirce had made, which irrevocably changed the course of his life, as well as his semiotic (...) theory. By courtesy of Professor Dr. Nathan Houser and the Peirce Edition Project, the writer of the present paper was granted access to the archive materials containing the Max H. Fisch — Maurice Auger correspondence and Victor Lenzen’s notes on Juliette. The paper aims at arranging the dispersed data obtained from these and other sources into a set of several distinct versions, which curiously refer to each other and collectively impose a certain order on some major abductions concerning Juliette’s identity. (shrink)

The relationship between logic and ethics is one of the basic and most essential questions of classical philosophical analysis. Since the time of the Pythagoreans, the fundamental unity of the two – whether by means of vague intuition, an elaborate conceptual scheme, or even a carefully crafted lifestyle – has led philosophers to identify truth and virtue. In his critical philosophy Kant put this unity of truth and virtue to extensive and rigorous trial to determine what conditions, if any, a...

In The Sources of Normativity Korsgaard introduces her conception of practical identities understood as the source of moral obligations. This conception forms a point of transition from Korsgaard’s theory of action to her solution to the problem of the authority of moral norms. In order to describe how universal categorical reasoning is compatible with the moral content of particular practical decisions, Korsgaard needs to show how our contingent practical identities can be reconciled with what she defines as the universally shared (...) identity that expresses our humanity. To make this reconciliation work, she devises an argument for the public shareability of reasons amended by her reinterpretation of the Kantian as if principle. I suggest that, in doing so, Korsgaard steps too far away from Kant’s architectonic approach to the question of why moral norms bind us, and that, consequently, the Korsgaardian reconciliation between the two kinds of identities, as it stands, cannot be accomplished. (shrink)

This book is about the relationship between necessary reasoning and visual experience in Charles S. Peirce’s mathematical philosophy. It presents mathematics as a science that presupposes a special imaginative connection between our responsiveness to reasons and our most fundamental perceptual intuitions about space and time. Central to this view on the nature of mathematics is Peirce’s idea of diagrammatic reasoning. In practicing this kind of reasoning, one treats diagrams not simply as external auxiliary tools, but rather as immediate visualizations of (...) the very process of the reasoning itself. Thus conceived, one's capacity to diagram their thought reveals a set of characteristics common to ordinary language, visual perception, and necessary mathematical reasoning. The book offers an original synthetic approach that allows tracing the roots of Peirce’s conception of a diagram in certain patterns of interrelation between his semiotics, his pragmaticist philosophy, his logical and mathematical ideas, bits and pieces of his biography, his personal intellectual predispositions, and his scientific practice as an applied mathematician. (shrink)

The conception of two kinds of practical identities, which Korsgaard introduces in the Sources of Normativity, helps her explain how universal categorical reasoning is compatible with the moral content of individual practical decisions. Based on this conception, she devises an interpretation of the Kantian as if principle amended by her argument for the public shareability of reasons. I suggest that, in doing so, Korsgaard steps too far away from Kant’s architectonic approach to the question of why moral norms bind us, (...) and that, as a result, the Korsgaardian explanation, as it stands, cannot be accomplished. (shrink)

InMind and World,John McDowell claims that we need to steer our way between bald naturalism and rampant platonism as two ways to explain our capacity to use concepts. Performing this task requires an explanation of how concepts can be both socially charged and, at the same time, genuinely involving the world as it really is. I suggest that McDowell’s explanation is insufficient and that Wilfrid Sellars’s idea of sense impressions might be used to clarify the relationship between social practices and (...) conceptual knowledge without incurring too much damage to the overall architectonics of McDowell’s theory.DansMind and World, John McDowell affirme que nous devons nous éloigner du naturalisme dépouillé et du platonisme exubérant comme étant deux manières d’expliquer notre capacité à utiliser des concepts. Pour accomplir cette tâche, il est nécessaire d’expliquer comment les concepts peuvent être à la fois chargés socialement et réellement engagés avec le monde tel qu’il est. Je suggère que l’explication de McDowell est insuffisante et que l’idée de Wilfrid Sellars des impressions sensorielles peut être utilisée pour clarifier la relation entre les pratiques sociales et la connaissance conceptuelle, et ceci sans faire encourir trop de dégâts à l’architectonique générale de la théorie de McDowell. (shrink)

This paper compares Charles Peirce’s and Robert Brandom’s conceptions of normative objectivity. According to Brandom, discursive norms are instituted by practical attitudes of the members of a community, and yet the objectivity of these norms is not reducible to social consensus. Peirce’s conception of normative objectivity, on the contrary, is rooted in his idea of a community of inquiry, which presupposes a consensus achievable in the long run. The central challenge in both cases is to explain how the norms that (...) all members of a community take to be correct differ from those that are correct objectively. I argue that, in meeting the challenge of reconciling the social character of knowledge and the objectivity of norms shared by a community of knowers, Brandom’s approach might benefit from the Peircean idea of the ultimate agreement. (shrink)

The present paper is aimed at showing some correlations between Charles Peirce’s life, his intellectual habits as a logician and mathematician, his semiotic theory and his practice as a geodesist. For this purpose, it makes use of Peirce’s ideas about the nature of visual experience, some facts of his intellectual biography, and his definitions of sign and the term “virtual.” It appears that Peirce’s mature pragmatist and semiotic ideas find some support in his early practice as a scientist and a (...) mathematician, thus providing an interesting example of the intersection of scientific practice and philosophical speculation. (shrink)