Re: modal logic and possible worlds

2002-08-16 Thread Bruno Marchal
At 10:29 -0700 13/08/2002, Wei Dai wrote: Does it mean anything that S4 and intuitionistic propositional calculus (= 0-order intutionistic logic, right?) ... Right. have the same kind of models, or is it just a coincidence? I guess Tim is saying that it does mean something, but I

Re: modal logic and possible worlds

2002-08-16 Thread Bruno Marchal
At 10:11 -0700 14/08/2002, Wei Dai wrote: Let me generalize my question then. Is it true that for any modal logic that has a semantics, any sentence in that logic has a corresponding sentence in non-modal quantificational logic with the same meaning? It depends of the semantics. It depends of

Re: modal logic and possible worlds

2002-08-16 Thread George Levy
I have been following the latest very scholarly exchange involving different logical models in relation to the MWI, however I fail to see how it relates to my own perception of the world and my own consciousness unless I think according to those formal systems which I think is unlikely. Using