Abstract
In forming groups—corporations, teams, academic departments, juries—humans gain new ways of acting in the world. Jennifer Lackey argues that groups need to be held responsible for their actions, and therefore need to be subject to epistemic evaluation. To criticize receptive or reckless behavior on the part of a corporation, for example, we need some account of what it is for a group to believe something, and for a group belief to be justified. In Lackey’s account, group epistemic states are a function of the states of individual operative members. After raising some difficulties for her formulation of this function, this article raises questions about Lackey’s operative-member account can apply to new types of group agent, with a particular focus on the epistemic status of algorithmic systems that harvest human data.