- Oral Disputation in the Gymnasium Logicum by Bartholomäus Keckermann and Dependent Seventeenth Century Tracts
- Revisiting the Exegetical Tradition of Galen’s Prologue to the Art of Medicine before Leoniceno: Logic, Teaching, and Didactics in Pietro Torrigiano’s Plusquam commentum
- Saying Something about a Concept: Frege on Statements of Number
- Between Imagination and Gambling. The Forms of Validity in Scholastic Logic
- God, Gluts and Gaps: Examining an Islamic Traditionalist Case for a Contradictory Theology
- Where is ‘There is’ in ‘∃’?
- Introduction to ‘Studies in Post-Medieval Logic’
- Abharī’s Solution to the Liar Paradox: A Logical Analysis
- Changes in British Logic Teaching During the Sixteenth and Seventeenth Centuries
- A Gricean Interpretation of Nāgārjuna’s Catuṣkoṭi and the No-Thesis View
- Kurt Gödel’s Anticipation of the Turing Machine: A Vitalistic Approach
- Ein halbordnungstheoretischer Widerspruchsfreiheitsbeweis
- Lorenzen’s Proof of Consistency for Elementary Number Theory
- Horst Wessel: Contributions to the Theory of Logical Consequence, Non-Traditional Theory of Predication and Logical Theory of Terms
- Leibnizian Identity and Paraconsistent Logic
- Proof by Assumption of the Possible in Prior Analytics, 1.15; How Not to Blend Modal Frameworks
- The Venn-MacColl Dispute in Nature
- Robert Kilwardby’s Science of Logic: A Thirteenth-Century Intensional Logic
- Hobson’s Conception of Definable Numbers
- Bocheński’s Formalization of Summa Theologiae (Ia,75,6) Reconsidered
- Frege: A Philosophical Biography
- On Jan Łukasiewicz’s ‘The Principle of Contradiction and Symbolic Logic’
- The Principle of Contradiction and Symbolic Logic
- On Jan Łukasiewicz’s ‘The Principle of Contradiction and Symbolic Logic’
- Proof vs Provability: On Brouwer’s Time Problem