Summary: Tamar Gendler argues that, for those living in a society in which race is a salient sociological feature, it is impossible to be fully rational: members of such a society must either fail to encode relevant information containing race, or suffer epistemic costs by being implicitly racist.
Comment: In this paper, Gendler argues that there is an epistemic costs for being racists. It is a useful material for teachings on philosophy of bias, social psychology, epistemology and etc. Note that there are two nice comments on this paper: one is Andy Egan (2011) "Comments on Gendler's 'the epistemic costs of implicit bias', the other is Joshua Mugg (2011) "What are the cognitive costs of racism? a reply to Gendler". Those two papers can be used togehter with Gendler's paper in increasing a dynamic of debate.