Logique Et Analyse 249:111-129 (2020)

Jens Lemanski
Fernuniversität Hagen
In the year 1714, Johann Christian Lange published a baroque textbook about a logic machine, supposed to simulate human cognitive abilities such as perception, judgement, and reasoning. From today’s perspective, it can be argued that this blueprint is based on an inference engine applied to a strict ontology which serves as a knowledge base. In this paper, I will first introduce Lange’s approach in the period of baroque logic and then present a diagrammatic modernization of Lange’s principles, entitled Calculus CL. Finally, I would like to discuss the possibilities of how to apply CL to modern cases of concern by using an example from epidemiology.
Keywords Logic  Visual Reasoning  Logic Diagrams  Ontological Reasoning  Ontology  Epidemiology
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