Questions tagged [possible-worlds]

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Propositions that can't be used to distinguish possible worlds

Are there known ways of formalizing the notion of propositions that can't be targeted by counterfactuals in a coherent way? Or of propositions that are outside the scope of the framework in question? ...
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127 views

Can Schmidhuber's hypothesis reproduce all types of universes? And Wheeler's it from bit? Or Weizsäcker's ur-theory?

I found a paper that talked about paraconsistent logic systems (https://en.wikipedia.org/wiki/Paraconsistent_logic) and trivialist systems (https://en.wikipedia.org/wiki/Trivialism) and the ...
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126 views

Does Tegmark himself include paraconsistent mathematical structures in his mathematical multiverse hypothesis?

Tegmark postulates in his hypothesis that all possible mathematical structures would exist. But does he include also possible mathematical structures described by other types of logic like ...
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60 views

Can a Rigid Designator still exist if there is only one possible world?

According to Kripke, a rigid designator is a pronoun (but not all pronouns are rigid designators) and they pick out the same unique individual in each possible world. I understand this, however, if ...
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124 views

Modal logics - philosophical paradoxes using modeling by possible worlds

I'm searching for "paradoxes" in classical modal logics, meaning lines of reasoning which give a counterintuitive conclusion if performed in classical logic, which can be modelled by the (semantical) ...
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63 views

Is there a symbolic formulation of modal realism?

Is there a symbolic formulation of modal realism, i.e. the doctrines of modal realism captured in some formal system?
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2answers
165 views

What's the difference between logical modalities and physical modalities?

I am just wondering what's the difference between the two. I would say that there is something different, but honestly I can't define what it is exactly. What do you think?
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1answer
87 views

Having S5 system Why we need to use WPSR in Gale Pruss New cosmological arguement?

As you know Gale_ Pruss improved The cosmological argument using WPSR instead of Strong PSR. They in their 1999 article said if it be possibly that there be a God who freely created the world using ...
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Does denying the Limit Assumption in counterfactual logic lead to contradiction?

According to the similarity semantics for counterfactuals, a counterfactual A > C is true iff on the most similar class of worlds to the actual world (or any given world the counterfactual's truth ...
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33 views

Did Carnap propose some kind of Modal Realism?

I have read in several pages that Rudolf Carnap, just as David Lewis (The creator of Modal Realism philosophical hypothesis) proposed that every logical proposition exists as a universe But is this ...
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27 views

What is the Lange's viewpoint on laws of nature?

I am just wondering what is the Lange's philosophical perspective on laws of nature and what line of thought he follows in the contemporary debate.
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265 views

Did Robert Nozick's “Principle of Plenitude” propose the existence of universes based on different fundamental logics?

Philosopher Robert Nozick proposed the "Principle of Plenitude" (or of Fecundity), which proposes the existence of all possible worlds. I have a feeling that it is different from David Lewis' Modal ...
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129 views

Real impossible worlds

What is the name of a/the metaphysic that affirms the reality of all worlds including impossible worlds? Actualism denies the reality of all non-actual worlds, possibilism affirms the reality of all ...
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35 views

Time of Occurrence of Events

I'm wrestling with the notion of events in indeterministic worlds. Suppose that given an event type and a world we can in principle tell if the event occurs in that world. (Indeed we could represent ...