Full Idea
We can say of a wooden table that it would have been possible for it to have originated from some different matter, even though it is not actually possible. So what is necessary fails to be necessarily necessary, and S4 modal logic is fallacious.
Gist of Idea
What is necessary is not always necessarily necessary, so S4 is fallacious
Source
Nathan Salmon (The Logic of What Might Have Been [1989], I)
Book Reference
Salmon,Nathan: 'Metaphysics, Mathematics and Meaning' [OUP 2005], p.131
A Reaction
[compressed]