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10. Modality / A. Necessity / 7. Natural Necessity

[necessary facts about the physical world]

18 ideas
The world is physically necessary, as its contrary would imply imperfection or moral absurdity [Leibniz]
Natural necessity is the unconditioned necessity of appearances [Kant]
Laws of nature remain the same through any conditions, if the underlying mechanisms are unchanged [Harré]
Instead of being regularities, maybe natural laws are the weak a posteriori necessities of Kripke [Kripke, by Psillos]
Physical necessity may be necessity in the highest degree [Kripke]
What many people consider merely physically necessary I consider completely necessary [Kripke]
What is often held to be mere physical necessity is actually metaphysical necessity [Kripke]
Natural necessity is not logical necessity or empirical contingency in disguise [Harré/Madden]
The relation between what a thing is and what it can do or undergo relate by natural necessity [Harré/Madden]
A necessity corresponds to the nature of the actual [Harré/Madden]
Natural necessity is when powerful particulars must produce certain results in a situation [Harré/Madden]
People doubt science because if it isn't logically necessary it seems to be absolutely contingent [Harré/Madden]
Property or event relations are naturally necessary if generated by essential mechanisms [Harré/Madden]
Causal necessities hold in all worlds compatible with the laws of nature [Lewis]
Because 'gold is malleable' is necessary does not mean that it is analytic [Audi,R]
Nomological necessity is expressed with intransitive relations in modal semantics [Salmon,N]
Nomological necessity is truth in all logically possible worlds with our laws [Hanna]
Relations are naturally necessary when they are generated by the essential mechanisms of the world [Mumford/Anjum]