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If metaphysics is justified in its claim to explicate the basic beliefs that all of our other beliefs -- – basic as well as nonbasic -- – necessarily presuppose, then there is at least this sense in which metaphysical beliefs may be said to provide the foundation for all other kinds of beliefs. 

But just as there can never be a valid inference from the universal to the particular, so there cannot be a valid inference from metaphysical beliefs to other more particular kinds of beliefs. Therefore, metaphysical beliefs may not be said to be foundational for other kinds of beliefs in this sense. From the truth of metaphysical beliefs as such, one cannot validly infer the truth of any other more particular kinds of beliefs, save in conjunction with other true beliefs comparably particular. 

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