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what is the distinction between prima facie and ultima facie evidence in epistemology
In "Wright contra McDowell on Perceptual Knowledge and Scepticism" by Duncan Pritchard we read: << ..once one notices that the "prima facie" evidence that S has for believing the type-II proposition -encapsulated in the type-I proposition - is only "ultima facie" good evidence inthis regard provided that S already has independent grounds for believing that she is not a
My question regards the notion of prima facie ultima facie justification and evidence in the context of epistemology; what do they refer to and what is the reason to distinguish them?
thank you very much for your consideration
Hossein Rahmani