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  • Kit Fine
  • Notre Dame Journal of Formal Logic
  • 1972
Ordinary modal logic deals with the notion of a proposition being true in at least one possible world. This makes it natural to consider the notion of a proposition being true in n possible worlds(More)
This paper gives a mode&g for Ackermann’s systems Kr’ and JI”, Anderson’s and Belnap’s system E and R, and several of their subsystemsl. The distinctive feature of this modelling is a point-shift in(More)
I lay down a system of structural rules for various notions of ground and establish soundness and completeness. Ground is the relation of one truth holding in virtue of others. This relation is like(More)