This version of the distinction between undercutting and rebutting defeaters is crude but will do for our purposes. For recent discussion of the distinction see M. Bergmann, Justification Without Awareness, Oxford University Press, 2006, and for classic discussion see J. Pollock, Contemporary Theories of Knowledge. (Towota, NJ: Rowman And Littlefield Publishers). 1st edition, 1986. 15[15] Huemer (op cit, Chapter 5.4) makes explicit that his notion of justification is meant to be internalist. See also Pryor (2000), footnote 9.
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