The Aristotelian "square of oppositions" is at the centre of recent developments in the geometry of logic. The image below is a modified representation of the logical tetra-icosahedron defined by Regis Pellisier [2004, 2009]. I have moved the nodes and edges around to better show the standard logical square (depicted in red). The labels "Immediate", … Continue reading Mapping the Logic of Action

Continuing with the subject of logic, here is a diagram I did after reading the work of A. Moretti [2003, 2004], H. Smessaert [2004, 2009] and R. Pellisier [2004, 2009]. These researchers have found --following previous progress achieved mainly by Blanché [1953] and Sesmat [1951] -- that logical oppositions can be represented geometrically in a … Continue reading Geometry of Oppositions (Logic!)

The Circle of Trust for Information Systems Security The philosophy behind these pages and the I&AM Reference Architecture is based on the idea of the “Circle of Trust”. In this context, “security” is interpreted as the definition, the establishment, the enforcement and the verification of trust. (Reference: John Arnold, Information Security Bulletin, 2006). The I&AM … Continue reading Security Perspectives

Are you interested in Actor-Oriented-Programming or the "logic of agency"? If the answer is yes, then you will benefit from studying the XII Century work by Anselm of Canterbury (St. Anselm). The works of Sara Uckelman and Douglas Walton (see notes in the Mind Map) gave me surprising insights into the achievement of this "old" … Continue reading St. Anselm of Canterbury: Logic of Action