Keyword: Epistemic Logic
Article in Journal | Posted 09/08/2018
Ma, Minghui, Pietarinen, Ahti-Veikko (2018). Gamma graph calculi for modal logics
We describe Peirce’s 1903 system of modal gamma graphs, its transformation rules of inference, and the interpretation of the broken-cut modal operator. We show that Peirce proposed the normality rule...