What more is required of a belief, besides being justified and true (JTB), if the belief is to count as knowledge? In my view, at least two further conditions are required: the belief must meet the conditions of safety and adherence.
Safety is popular these days: it has been defended by many distinguished epistemologists, such as Duncan Pritchard and Timothy Williamson, among others. But adherence – the fourth condition that Robert Nozick imposed on knowledge – has few defenders. Most of the philosophers who have discussed adherence have rejected it. In this post, I defend adherence against its detractors.
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