I'm in a beginning logic class and so far we have learned four rules: Assumption, Modus Pollens, Double Negation and Modus Tollens. I understand everything but Modus Tollens. The other downside is ...

In college, I learned about the myriad logical fallacies that pervade our world. Good logic, it turned out, was pretty restrictive. It consisted primarily of modus ponens—“If A is true, then B ...

“Epistemic Modals and Modus Tollens” (2016). Philosophical Studies 173:10. “Remarks on Counterpossibles” (2013). w/ B. Brogaard. Synthese 190. 2013. “Knowability Noir: 1945-1963” in Salerno J. (ed.) ...