By Dale Jacquette
This number of newly comissioned essays through foreign individuals bargains a consultant review of an important advancements in modern philosophical logic.
- Presents controversies in philosophical implications and functions of formal symbolic logic.
- Surveys significant developments and provides unique insights.
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Additional resources for A Companion to Philosophical Logic
The important idea of carrying out purely mechanical, ‘formal,’ proofs, irrespective of content, emerges only with Leibniz, and does not yet form part of the medieval tradition in logic. Owing to this logical ‘picture theory’ avant la lettre for the relation between mind and world, the theory of categories, especially in the form of simple predications, or categorizations, [a is an a], is sometimes seen as part of logic (as well as of metaphysics). The medieval theories as to the truth of propositional combinations of terms – categorical predications – vary.
2. 3. What is past is necessary. The impossible does not follow from the possible. There is something possible which neither is nor will be true. The first of these recalls the argument of On Interpretation 9. ’ His view here conflicts directly with Aristotle, who asserts that there are possibilities that never become actual. What Diodorus may have been doing, in addition to defending a Megarian view of universal necessitation, was finding a way to talk about possibilities in a Megarian view of the world.
G. SUNDHOLM allels between medieval conceptions and those of Wittgenstein. Simo Knuuttila, Modalities in Medieval Philosophy (London, 1993) contains much that is of interest for the modern theory of modality, as does John Duns Scotus, Contingency and Freedom: Lectura I 39 (ed. and tr. by A. Vos Jaczn. ), New Synthese Historical Library, vol. 42 (Dordrecht: Kluwer, 1994). Mikko Yrjönsauuri’s Helsinki dissertation Obligationes – 14th Century Logic of Disputational Duties, in: Acta Philosopphica Fennica, 55 (1994), summarizes much of what is known about the theory of obligations.
A Companion to Philosophical Logic by Dale Jacquette