Unexpected a posteriori necessary laws of nature

Australasian Journal of Philosophy 83 (4):533 – 548 (2005)
In this paper I argue that it is not a priori that all the laws of nature are contingent. I assume that the fundamental laws are contingent and show that some non-trivial, a posteriori, non-basic laws may nonetheless be necessary in the sense of having no counterinstances in any possible world. I consider a law LS (such as 'salt dissolves in water') that concerns a substance S. Kripke's arguments concerning constitution show that the existence of S requires that a certain deeper level law or variants thereof hold. At the same time, that law and its variants may each entail the truth of LS. Thus the existence of S entails LS. Consequently there is no world in which S exists and fails to obey LS. I consider the conditions concerning the fundamental laws that would make this phenomenon ubiquitous. I conclude with some consequences for metaphysics.
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DOI 10.1080/00048400500338799
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Nora Berenstain (2014). Necessary Laws and Chemical Kinds. Australasian Journal of Philosophy 92 (4):631-647.
Alexander Bird (2009). … And Then Again, He Might Not Be. Australasian Journal of Philosophy 87 (3):517-521.

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