Abstract: In order to achieve a deeper understanding of warrant (and in reply to some objections), I turn in this chapter to a closer look at the idea of a design plan. I do so under the following six section headings: the max plan versus the design plan, unintended by-products, functional multiplicity, the distinction between purpose and design, trade-offs and compromises, and defeaters and overriders. In connection to the notion of trade-offs and compromises in our cognitive design plan, I take up the subject of Gettier problems, trying to understand what really underlies Gettier situations and then seeing how these situations look from the vantage point of my conception of warrant. While Gettier problems do not in fact plague my account of warrant (as I try to point out), considering them nonetheless enables us to deepen our analysis of warrant. I close the chapter with a brief argument for the conclusion that my account of warrant qualifies as an example of naturalized epistemology (or naturalistic epistemology).

Keywords: defeater, design plan, Gettier, max plan, naturalistic epistemology, naturalized epistemology, overrider, warrant,