Then in the early 20th century, Jan Lukasiewicz proposed a three-valued logic (true, possible, false), which never gained wide acceptance. In 1965, Lotfi A. Zadeh of the University of California at ...

Synthese, Vol. 198, No. S22, Supplement 22: Special Issue on Varieties of entailment (2021), pp. S5555-S5571 (17 pages) Following a proposal by Kooi and Tamminga, we introduce a conservative ...

I argue that a recent philosophical interpretation by Jc Beall of the middle value of Weak Kleene (three-valued) logic (known also as Bochvar's logic) as 'being off-topic' is untenable. My main claim ...