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Essays on Logic and its Applications in Philosophy

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Jan Wolenski

This is a collection of essays about logic and its applications to various philosophical problems. In general, it is argued that logic constitutes an important device of philosophical analysis. Concerning the nature of logic the author defends the thesis that first-order logic is the logic. Among the philosophical problems to which logic is applied in the essays are: truth, consistency, realism, foundations of semantics, psychologism, undetermination of theories by empirical data, modalities, value concepts, identity, vagueness, God’s existence, transcendentals, legal reasoning, category mistakes, bivalence, the cognitive relation, and meaningfulness.
Contents: Logic, Rhetoric and Hermeneutic in Philosophy – Truth and Satisfaction by the Empty Sequence – Metalogical Observations about Undetermination of Theories by Empirical Data – Psychologism and Metalogic – Malum, Transcendentalia and Logic – Logic, Semantics, and Realism – First-Order Logic: (Philosophical) Pro and Contra – What is Formal in Formal Semantics? – On Some Formal Properties of Truth – Gödel, Tarski and Truth – Is Truth an Ontological Concept? – What are Truth-Bearers? – A Generalization of Hume’s Thesis – Tarskian and Post-Tarskian Truth – Two Critical Contributions to the Problem of Truth and Meaning – On So-Called Sentences with Category Mistakes – The Cognitive Relation in a Formal Setting – Models of Legal Reasoning – The Character of T-Equivalences – Remarks on Identity across Possible Worlds – Applications of Squares of Oppositions and Their Generalizations – Theism, Fideism, Atheism, Agnosticism – The Principle of Bivalence and Suszko – Vagueness and Ambiguity – Truth and Consistency – Meaningfulness, Meaninglessness and Language-Hierarchies – Some Lessons from Ingarden’s Criticism of the Verifiability Principle – Remarks on Axiomatization within Logic.