Canonical Counterpart Theory

Canonical Counterpart Theory

I n a recent article in Analysis , Graeme Hunter and William Seager ( 1981 ) attempt to rescue counterpart theory (CT) from some objections of Hazen 1979 . They see these objections as arising from ‘uncritical use of the translation scheme originally proposed by Lewis’, and intend to meet them by refraining from use of that scheme. But they do not offer a new scheme; they say ‘...it is no more ...

Relative-sameness counterpart Theory

Just as set theory can be divorced from Ernst Zermelo’s original axiomatization of it, counterpart theory can be divorced from the eight postulates that were originally stipulated by David Lewis (1968, p. 114) to constitute it. These were postulates governing some of the properties and relations holding among possible worlds and their inhabitants. In particular, counterpart theory can be divorc...

Propositions and counterpart theory

The Logic of Counterpart Theory with Actuality

It has been claimed that counterpart theory cannot support a theory of actuality without rendering obviously invalid formulas valid or obviously valid formulas invalid. We argue that these claims are not based on logical flaws of counterpart theory itself, but point to the lack of appropriate devices in first-order logic for “remembering” the values of variables. We formulate a mildly dynamic v...

968 Counterpart Theory and Quantified Modal Logic

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