In memory of  Newton da Costa (1929-2024). This workshop is part of the 8th World Congress on Universal Logic, that will take place in Cusco, Peru, December 9-14, 2025.  

Organizer

Keynote Speaker

Call for Papers

Non-classical logics – such as paraconsistent, intuitionistic, relevant, many-valued, modal, and fuzzy logics – have become essential tools for challenging the boundaries of classical reasoning. They open new perspectives not only in mathematics and computer science but also in philosophy, epistemology, metaphysics, and ethics. This workshop aims to foster dialogue across disciplines and traditions by exploring the philosophical foundations, implications, and applications of non-classical logics.

Topics may include, but are not restricted to, the following questions:

• What are the philosophical motivations for adopting non-classical logics?

• How do different families of non-classical logics challenge classical notions of truth, validity, and consequence?

• What is the relationship between non-classical logics and concepts such as contradiction, vagueness, or modality?

• Can non-classical logics provide better accounts of reasoning in natural language, law, or ethics?

• How do non-classical logics connect to debates in metaphysics (e.g., identity, existence, modality)?

• What role do non-classical logics play in the philosophy of mathematics and formal ontology?

• Are there limits to non-classical logics, and do they require a meta-classical framework for their justification?

• How can comparisons across different non-classical systems enrich philosophical analysis?

• Do non-classical logics challenge the thesis of the universality and topic-neutrality of logic?

• What is the relation between (non-)classical logic and Aristotelian logic?

Submit a one page  abstract by October 5,  2025 to   non.classical.logics@seplo.org

Duration of contributing talks is 30mn including discussion. There will be a round table at the end of the workshop with the participation of all the speakers.

Accepted contributors will be invited to submit a full paper for inclusion in a volume on Non-Classical Logics edited by the organizer following the workshop.