We consider extending the modal logic KD45, commonly taken as the baseline system for belief, with propositional quantifiers that can be used to formalize natural language sentences such as ...

Epistemic logic constitutes a rigorous framework for representing and reasoning about knowledge and belief. Central to this discipline is the formalisation of how agents acquire, retain and attribute ...

Truth diagrams (TDs) are introduced as a novel graphical representation for propositional logic (PL). To demonstrate their epistemic efficacy a set of 28 concepts are proposed that any comprehensive ...