The next session of the Logica Universalis Webinar will be this coming Wednesday, September 9 at 4pm CET:
Speaker: Jens Lemanski, University of Münster, Germany https://www.uni-muenster.de/Wissenschaftstheorie/en/personen/mitgliederwwu/jenslemanski.html Title: The Protestant Tradition of Eulerian Diagrams Abstract: This paper examines the early modern history of Eulerian diagrams and argues that their development was shaped by confessional contexts. While logic is often viewed as a neutral and purely rational discipline, we show that logic diagrams in the and centuries were embedded in broader religious, philosophical, and institutional traditions. After clarifying the concept of logic diagrams and the specific characteristics of Eulerian representations, we identify methodological challenges in reconstructing their history and outline several external factors that influenced their use. Using two case studies—Nicolaus Reimers Ursus in thecentury and Erhard Weigel in the century—we demonstrate that Eulerian diagrams were predominantly cultivated in Protestant circles, in contrast to Byzantine and Roman Catholic diagrammatic traditions such as crescent diagrams, the square of opposition, and phoebifer axis diagrams. These competing traditions differed not only in form but also in their underlying representations of proof, particularly regarding direct versus indirect methods. The paper argues that confessional affiliation, together with philosophical convictions such as empiricism and rationalism, contributed to the selection and evaluation of diagrammatic techniques. By situating early modern logic within its cultural context, the study highlights the role of external factors in shaping representational practices in logic. https://link.springer.com/article/10.1007/s11787-026-00408-7 Introductory part, before the talk: The LARA project will be presented by J.-Y.Beziau: https://www.logicandreligion.com/lara as well as the Logica Universalis double issue of which the above paper is part of (Issue 1-2, Volume 20, 2026): >From Varanasi to Sinaia, 3rd and 4th World Congresses on Logic and Religion, Part.2 Agnieszka Rostalska and Jean-Yves Beziau (eds) https://link.springer.com/journal/11787 The forthcoming 5th World Congresses on Logic and Religion will also be presented, by Maira de Cinque https://5wocolor.com/ Chair: Sayantan Roy, editorial assistant Logica Universalis Everybody is welcome to join, register here on Cassyni (if not done yet): https://cassyni.com/register and access the session here: https://cassyni.com/s/logica-universalis The zoom link will be available 30mn before the start of the session on the following page: https://cassyni.com/events/6kiMHJ9YQWRp2LvAiKWWEq >----------------------------------------------------------------------------- Jean-Yves Beziau Organizer of the Logica Universalis Webinar Founder and Editor-in-Chief Logica Universalis https://sites.google.com/view/jyb-events/ -- LOGICA-L Lista acadêmica brasileira dos profissionais e estudantes da área de Lógica <[email protected]> --- Você está recebendo esta mensagem porque se inscreveu no grupo "LOGICA-L" dos Grupos do Google. Para cancelar inscrição nesse grupo e parar de receber e-mails dele, envie um e-mail para [email protected]. Para ver esta conversa, acesse https://groups.google.com/a/dimap.ufrn.br/d/msgid/logica-l/CAF2zFLBSJF75t4YN%3DyCaBnejtpQ2PbRypOuFbQdnX_VkyiiNrg%40mail.gmail.com.
