I have been blessed with many opportunities to present and discuss the material that has eventually found its way into this book. In that regard, I am especially grateful to the faculty and graduate students at Fordham University, the University of Geneva, the University of Helsinki, Saint Louis University, and Stirling University, where I have presented material in seminars and lectures. I am also grateful for two conferences that were organized around relevant materials: one at Stirling University, hosted by Duncan Pritchard and funded by the Scots Philosophical Club, and one at the University of Geneva, hosted by Pascal Engel and funded by his Episteme group. In addition to these opportunities for extended discussions, various chapters of this book have been presented at conferences and department colloquia in the United States, Latin America, and Europe. I am very grateful to the commentators and audiences who helped me to think through the material on these occasions.

I am certain that I have missed people who well deserve a more explicit thanks and acknowledgment, but those who come most easily to mind are the following: Charity Anderson, Dave Anderson, Robert Audi, Heather Battaly, Peter Baumann, Michael Bergmann, Sven Bernecker, Dan Breyer, Adam Carter, Scott Crothers, John Davenport, Keith DeRose, Mylan Engel, Jeremy Fantl, Paul Faulkner, Richard Feldman, Bryan Frances, Robin Gaier, Doug Geivett, Tamar Gendler, Sandy Goldberg, Peter Graham, Adam Green, Stephen Grimm, Bob Hale, Ben Hart, John Heil, David Henderson, Terence Horgan, Mike Jacovides, Dirk Koppelberg, Hilary Kornblith, Mark Lance, Matt McGrath, Anne Meyland, Jennifer Nagel, Ram Neta, Daniel Nolan, Phillip Percival, Michael Potter, John Putz, Philip Quinn, Robert Roberts, Bruce Russell, Ted Sider, Josef Simpson, David Sosa, Jason Stanley, Matthias Steup, Peter Sullivan, John Turri, Fritz Warfield, Dennis Whitcomb, Michael Williams, Jay Wood, and Linda Zagzebski.