Propositional calculus Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! “Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Rule of inference Pages in category "Propositional calculus" This category contains only the following page. R Rule of inference Retrieved from "http://psychology.wikia.com/wiki/Category:Propositional_calculus"