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Questions tagged [necessity]

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How to express that something that exists is possibly necessary in Modal Alethic Logic?

Suppose that A is True (like 1+1=2) , then how to formulate this proposition in Modal Alethic Logic? If A is the case, then it is possible that A is necessarily the case. For example : If I am ...
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Must an eternal object be uncaused?

Let's say that we grant that item "X" is eternal. By "eternal" we mean that it has always existed and that it always will exist. Because "X" is eternal, does it follow that it MUST be uncaused?
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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.