Simon Graf

When thinking about collective responsibility, we face a dilemma: on the one hand, we want to hold individuals, such as the responsible—or representative members accountable; on the other hand, we want to blame the entire corporation, as an independent entity over and above its composite parts. Such questions are taken up by Jennifer Lackey in her short but rich monograph. She points out that the two described ways of approaching collective responsibility are linked to the central divide between deflationist and inflationist approaches to social philosophy. While deflationists understand collective attitudes as being entirely grasped by analysing “individual members and their states”, inflationists hold that “group phenomena are importantly over and above, or otherwise distinct from, individual members and their states” (p. 3). Amidst several thought-provoking and insightful philosophical ideas introduced and discussed by Lackey, there is one that stretches throughout the entire book: the will to overcome this traditional division between inflationism and deflationism. As such, the book can be understood as having two interrelated projects, one being negative and the second being positive. The critical project is an extensive critical analysis of both inflationary/non-summativist, as well as deflationary/summativist approaches to socio-epistemological phenomena. In five chapters, each devoted to one phenomenon, Lackey discusses group belief (chapter 1), group justified belief (chapter 2), group knowledge (chapter 3), group assertions (chapter 4), and group lies (chapter 5).

Within collective epistemology, there is a class of theories that understand the epistemic status of collective attitude ascriptions, such as ‘the college union knows that the industrial action is going to plan’, or ‘the jury justifiedly believes that the suspect is guilty’, as saying that a sufficient subset of group member attitudes have the relevant epistemic status. In this paper, I will demonstrate that these summativist approaches to collective epistemology are incompatible with epistemic permissivism, the doctrine that a single body of evidence may rationalize multiple doxastic attitudes. In particular, I will make use of epistemic permissivism to provide a general recipe for generating so-called divergence cases, which demonstrate situations in which rationality requires group-level and member-level attitudes to diverge. I will call this class of cases permissive divergence cases. While other divergence cases have been discussed in the literature, permissive divergence cases prove themselves to be less susceptible to many of the worries raised against their competitors, while being directly built on an often-defended epistemological thesis.