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False Negatives, Steven Luper

Philosophy Faculty Research

In Philosophical Explanations, Robert Nozick suggested that knowing that some proposition, p, is true is a matter of being “sensitive” to p’s truth-value. It requires that one’s belief state concerning p vary appropriately with the truth-value of p as the latter shifts in relevant possible worlds. Nozick fleshed out this sketchy view with a specific analysis of what sensitivity entails. Famously, he drew upon this analysis in order to explain how common-sense knowledge claims, such as my claim to know I have hands, are true, even though we do not know that skeptical hypotheses are false. His …