Miriam Solomon is Professor and Chair in the Philosophy Department at Temple University, and Affiliated Professor at the Center for Bioethics, Urban Health, and Policy at the Lewis Katz School of Medicine at Temple University. She works in the areas of philosophy of science, philosophy of medicine, epistemology, and feminist philosophy. She is the author of Social Empiricism (2001), Making Medical Knowledge (2015), and numerous articles. She is Fellow of the College of Physicians of Philadelphia. Jeremy R. Simon, MD, PhD, is an emergency physician. He is Associate Professor of Medicine at Columbia University Medical Center, an attending physician in the New York-Presbyterian Emergency Medicine residency, and a member of the Ethics Consultation Service at New York-Presbyterian/CUMC. His primary academic research is in philosophy of medicine, and he also writes on medical ethics. Harold Kincaid is Professor of Economics at the University of Cape Town, South Africa. He is the author of numerous books, book chapters, and articles in the philosophy of science. Among his many books is the most recent, Classifying Psychopathology: Mental Illness and Natural Kinds (2014).