Modal realism

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Notion

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Science and technology

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What Wikipedia says

Modal realism is the view propounded by the philosopher David Lewis that all possible worlds are real in the same way as is the actual world: they are "of a kind with this world of ours." It states that possible worlds exist, possible worlds are not different in kind from the actual world, possible worlds are irreducible entities, and the term actual in actual world is indexical, i.e. any subject can declare their world to be the actual one, much as they label the place they are "here" and the time they are "now".

Excerpt from the Wikipedia article “Modal realism”, under the CC BY-SA 4.0 license. Read the article on Wikipedia