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48 views

Can one be a Modal Realist without also having to incorporate the existence of impossible worlds?

I know Modal Realism well enough itself, and have read many of the objections (and subsequent responses) that David Lewis himself took up in relation to the philosophical position. My question is, do ...
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1answer
32 views

The definition of a possible world

I have a two-part question about the definition of a possible world. I will make the assumption that time is tensed. First of all, is a possible world a complete list of all propositions that are ...
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1answer
36 views

Can different varieties of modality be used with existential quantification?

I'm wondering if it makes sense to talk about worlds which aren't this one being real. It seems like you can claim that something possibly exists. Now I'm wondering, because it seems to amount to ...
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0answers
37 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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1answer
34 views

Help understanding possible world formalism

I am a total novice to philosophy trying to make sense of a computer science article which makes reference to possible world theory. I don't really understand the formalization in the last sentence ...
2
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1answer
47 views

Modal Realism: Possible Worlds spatio-temporally isolated?

In Lewis' 5th doctrine of possible worlds in modal realism it says: Possible worlds are unified by the spatiotemporal interrelations of their parts; possible worlds are spatiotemporally isolated from ...
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2answers
96 views

Indiscernibility of possible worlds

According to Lewis, possible words are indiscernible from each other, that is, an individual in a possible world cannot say in which world it resides. It's somewhat similar to the indiscernibility of ...
2
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3answers
150 views

How to interpret “it is possible that x is impossible”?

The question is about the logical form of the sentence, x can be any object or process, actual infinity, tachyon, philosophical zombie, telepathy, etc. To conclude that x is impossible we are supposed ...
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2answers
129 views

Does Flatland exist according to modal realism?

Does Flatland exist according to modal realism, since it is a possible world?
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0answers
26 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 ...
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2answers
1k views

What do necessity and possibility mean in Aquinas' Third Way argument for God?

In his famous Summa Theologica, the Scholastic theologian Thomas Aquinas presents Five Ways to demonstrate the existence of God. Here is Aquinas' Third Way, the argument from contigency: The ...
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1answer
77 views

Abstractionism about Possible Worlds and the Contingently Non-Concrete

Concretists about possible worlds say that possible worlds are concrete entities (usually some kind of mereological sum of concrete individuals). Abstractionists say that worlds are abstract things: ...
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1answer
144 views

Is the Ideal World a possible world? [closed]

Is there any sense in postulating that there is a way to reach a so called "Ideal World"? By Ideal World I mean, in a sense, the best of all possible worlds.
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2answers
337 views

If there are infinite realities, do realities exist in which there are no infinite realities?

I don't have any experience with physics. I am just very interested to know whether or not this might be possible.
3
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1answer
488 views

The possibility of impossible

While thinking about the possible and impossible I came into the following conclusion. Some people say that nothing is impossible. But by saying that "nothing is impossible" they automatically ...
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3answers
123 views

Does the theory of multiple dimensions disprove itself?

This video suggests that a universe exists for each different possibility in the world. However, doesn't that mean that there must be a universe in which this theory has been disproved? Wouldn't that ...
6
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1answer
144 views

What comes first: Necessity or Possible Worlds?

The context of my question is van Inwagens 'Material Beings' and Siders essay 'Van Inwagen and the possibility of Gunk'. There Sider presents a counterexample, a gunk world, to the claim that ...
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2answers
105 views

Is there a possible world in which the secondary attributes of our world become primary?

After Aristotles wrote on substance, a theory developed about the attributes that could inhere in a substance - they were distinguished between primary & secondary. For example colour is a ...
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1answer
168 views

Does the universe have solid structures on multiple spatial scales?

Is it reasonable to suggest that if we were to "zoom out" further and further in space with our eyes focused on some object at our initial position, that all the solar systems, then galaxies, and so ...
3
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1answer
45 views

One-placed intersection operator

What is the meaning of a formulation like: "A iff ∩A ⊆p" A is a set of propositions, p is a specific proposition, and the whole formulation is explicated as "There is no possible world where all ...
3
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1answer
138 views

For the modal realist, do possible individuals (and worlds) exist necessarily?

For David Lewis's Modal Realism, do the worlds and individuals that inhabit them exist necessarily? In a sense, the answer is "no". For an individual to exist necessarily would be for it to have a ...
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3answers
1k views

Can we ever know the origin of universe? [closed]

For sake of argument, let's assume that everything has to come from something. In this case, our universe must have come from something, lets call it 'thing 1'. 'Thing 1' in turn must have come from '...
3
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2answers
190 views

How to address initial criticisms of modal logic, in particular “I can imagine a world where [necessary truth] is false?”

Whether you ultimately agree with it or not, I feel that a study of modal logic, including David Lewis's (and others') notion of possible words is a valuable facet of a proper understanding of logic ...