Logical System gentzen 5/15/12 Propositional Main Connective Your browser does not support html5 video. Propositional Truth Table Line Your browser does not support html5 video. Propositional Satisfiable Your browser does not support html5 video. Book traversal links for Help with First Three Propositional Games ‹ Tutorial 4: Arguments and searching for a counter example Up Help for Remaining Propositional Games ›