Questions tagged [possible-worlds]

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8
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2answers
440 views

Does Tegmark's Mathematical Universe hypothesis allow existence of alternative mathematics?

Tegmark's mathematical multiverse hypothesis assumes that all mathematical structures exist as universes But do you know whether his hypothesis also allows/accept universes described by other types ...
5
votes
3answers
9k views

What do necessity and possibility mean in Aquinas' Third Way argument for the existence of 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 third ...
3
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2answers
448 views

How does the concept of the 'virtual' (Deleuze) relate to 'counterfactuals' (Lewis)?

We read: "[...] Deleuze will reject the notion of the possible in favor of that of the virtual. Rather than awaiting realization, the virtual is fully real; what happens in genesis is that the ...
2
votes
2answers
571 views

Did David Deutsch really disprove the Simulation Hypothesis?

In The Fabric of Reality (1997) by David Deutsch, he says: Imagine a computer built to render every possible Virtual Reality. Suppose all possible environments produced by this generator can be ...
1
vote
1answer
73 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 ...
4
votes
1answer
473 views

Is there anyone who believes that all modal statements are meaningless or trivial?

It is often useful to interpret statements in various modal logics using possible-world semantics. For instance "it is necessary that P" means "P is true in all possible worlds", "it is possible that ...
5
votes
1answer
392 views

Can possible-but-non-actual objects have accidental properties?

The modal logic I am considering is the "Simplest Quantified Modal Logic" which combines first-order predicate logic with identity, with S5 in the most straightforward way, described here and slightly ...
3
votes
7answers
323 views

Is there an idea of non-spatial reality in philosophy?

Our world is spatial. In particular there are 3 dimensions and we can measure lengths of objects in either of them. However, when thinking about metaphysics I came to the conclusion that there might ...
3
votes
3answers
2k 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 '...