Parconsistency is a an important field of logic. A logical system is said to be paraconsistent, a term coined in 1976 by Francisco Miró Quesada at the request of Newton da Costa, if it has a negation not obeying the principle of non-contradiction. This principle was considered during many centuries as a fundamental basis of reasoning and/or of reality. Many paraconsistent systems have been presented during the 20th and 21st centuries. The paraconsistent newsletter provides information about paraconsistency: systems of paraconsistent logic, philosophical discussions surrounding them and their applications.

I started my research in logic in 1989 by doing a Master Thesis on Mathematical Logic on paraconsistent logic. Altough since then I have been working also on many other topics, in particular developing the Universal Logic Project, I have continuously been working on Paraconsistent Logic, publishing papers (see a list of about 50 papers here) and books (Handbook of Paraconsistency, New Directions in Paraconsistent Logic), organizing workshops and congresses (WCP 2003, WCP 2014) and producing this Paraconsistent Newsletter. JYB