possible worlds modality counterfactual

Are ‘Possible Worlds’ Possible?

In recent decades, the idea in modal logic and metaphysics of possible worlds has become a widely used tool in philosophy. But are the hypotheticals discussed using possible worlds even, well, possible? To test this idea, I am going to try to construct an idea of possible worlds by way of mathematical models for making adjustments to the world as understood in both a metaphysically materialist/physicalist sense as well as what assumptions must be present for immaterialist/spiritualist claims to be true.

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Possible Worlds and Free Will

A possible world is a way in which it is logically possible (does not result in contradiction) for reality to exist. There is a possible world in which everything is exactly the same, but it is 1 degree warmer than it is now; there is a possible world in which COVID-19 never existed; there is a possible world in which everything is exactly the same, but there is +1 more person existing right now. What is the nature of these possible worlds, and specifically, what is the nature of my relationship to myself in these possible worlds?

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