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The Knowledge Illusion by Steven Sloman and Philip Fernbach. Sloman and Fernbach’s research-grounded account of the illusion of explanatory depth and the community of knowledge that produces it provides the most directly applicable available treatment of the foundational mechanisms the article covers. Built directly on the Rozenblit and Keil and Keil distributed cognition research, their account of the specific ways that people confuse the social availability of explanations with their own genuine understanding gives the founder who wants to examine their own explanatory depth the most research-grounded and most practically applicable available framework for doing so. Their treatment of the commercial and political consequences of the IOED, and of the specific domains where the illusion is most active and most costly, maps directly onto the entrepreneurial decision contexts the article addresses. For the founder who wants to understand why their confidence in their understanding of their own business may substantially exceed the explanatory depth that confidence reflects, Sloman and Fernbach provide both the research foundation and the most accessible available account of its implications.