Knowledge of Consequences: An Explanation of the Epistemic Side-Effect Effect

The Knobe effect (Analysis 63(3):190–194, 2003a) consists in our tendency to attribute intentionality to bringing about a side effect when it is morally bad but not when it is morally good. Beebe and Buckwalter (Mind Lang 25:474–498, 2010) have demonstrated that there is an epistemic side-effect effect (ESEE): people are more inclined to attribute knowledge when the side effect is bad in Knobe-type cases. ESEE is quite robust. In this paper, I present a new explanation of ESEE. I argue that when people attribute knowledge in morally negative cases, they express a consequence-knowledge claim (knowledge that a possible consequence of an action is that harm will occur) rather than a predictive claim (knowledge that harm will actually occur). I use the omissions account (Paprzycka in Mind Lang 30(5):550–571, 2015) to explain why the consequence-knowledge claim is particularly salient in morally negative cases. Unlike the doxastic heuristic account (Alfano et al. in Monist 95(2):264–289, 2012), the omissions account can explain the persistence of ESEE in the so-called slight-chance of harm conditions. I present the results of empirical studies that test the predictions of the account. I show that ESEE occurs in Butler-type scenarios. Some of the studies involve close replications of Nadelhoffer’s (Analysis 64(3):277–284, 2004) study.