Orthodoxy in the contemporary debate on knowledge ascriptions holds that the truth‐value of knowledge ascriptions is purely a matter of truth‐relevant factors. One familiar challenge to orthodoxy comes from intuitive practical factor effects . But practical factor effects turn out to be hard to confirm in experimental studies, and where they have been confirmed, they may seem easy to explain away. We suggest a novel experimental paradigm to show that practical factor effects exist. It trades on the idea that people (...) retract knowledge attributions when practical factors shift. We also explain why the resulting data raise a serious challenge to orthodoxy. (shrink)

This paper defends a challenge, inspired by arguments drawn from contemporary ordinary language philosophy and grounded in experimental data, to certain forms of standard philosophical practice. The challenge is inspired by contemporary philosophers who describe themselves as practicing “ordinary language philosophy”. Contemporary ordinary language philosophy can be divided into constructive and critical approaches. The critical approach to contemporary ordinary language philosophy has been forcefully developed by Avner Baz, who attempts to show that a substantial chunk of contemporary philosophy is fundamentally (...) misguided. I describe Baz’s project and argue that while there is reason to be skeptical of its radical conclusion, it conveys an important truth about discontinuities between ordinary uses of philosophically significant expressions (“know”, e.g.) and their use in philosophical thought experiments. I discuss some evidence from experimental psychology and behavioral economics indicating that there is a risk of overlooking important aspects of meaning or misinterpreting experimental results by focusing only on abstract experimental scenarios, rather than employing more diverse and more ecologically valid experimental designs. I conclude by presenting a revised version of the critical argument from ordinary language. (shrink)

Two of the most orthodox ideas in epistemology are fallibilism and purism. According to the fallibilist, one can know that a particular claim is true even though one’s justification for that claim is less than fully conclusive. According to the purist, knowledge does not depend on practical factors. Fallibilism and purism are widely assumed to be compatible; in fact, the combination of these views has been called the ‘ho-hum,’ obvious, traditional view of knowledge. But I will argue that fallibilism and (...) purism are incompatible. The best explanation for fallibilism requires one to reject purism, while maintaining purism should lead one to reject fallibilism. It follows that the orthodox view of knowledge is deeply mistaken. (shrink)