 It’s hard to see how either view is defensible in light of the objections by Sosa, Bealer, and Hawthorne. Insofar as justification is relative to the evidence a person has, or should have, it seems possible for further evidence, either empirical or from intuition or rational insight, to override or undercut a person’s current evidence and thereby destroy that person’s current justification and knowledge. Nothing in the nature of a priori justification rules out that possibility. (See the discussion of Hartry Field, in  Section 4.5  below, for more on why it is possible for empirical evidence in particular to defeat a priori justification.)