What does possibly necessary mean in modal logic [crazy question actually]

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This discussion explores modal logic, specifically the implications of necessity and possibility in philosophical statements. The user presents a thought experiment involving the relationship between existence (X), non-existence (Y), and annihilation (Z). The conclusion drawn is that if one perceives oneself as the only existence, then the concept of annihilation becomes unimaginable. This reflects a solipsistic viewpoint, emphasizing the subjective nature of existence and the philosophical implications of living in a state of oblivion.

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Suppose the following

X is not necessarily not Y.
If X is Y then X necessarily cannot be Z.
Does that mean X cannot be Z?

I probably screwed up stating that...

To clarify
The first line is meant to be a solipsistic statement - I may be all there is.
The second line is meant to state that if I am all there is then I cannot imagine being annihilated.
In the third line I conclude that I cannot imagine my annihilation.


I'm not concluding that we must "live" forever in oblivion but it's kinda the idea.
 
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