Barry Loewer is a Professor of Philosophy at Rutgers University and director of the Rutgers Center for Philosophy and the Sciences. He works mainly on philosophy of science, focusing on issues in philosophy of physics and metaphysics. His publications include Counterfactuals and the Second Law, David Lewis's Humean Theory of Objective Chance, and Why is There Anything Except Physics?.

Jonathan Schaffer is Professor of Philosophy at Rutgers University. His research centers on metaphysics, epistemology, and language, and his publications include Monism: The Priority of the Whole, On What Grounds What, and Knowing the Answer.