Ronald N. Giere (Ph.D., Cornell University) is Professor of Philosophy at the University of Minnesota and a former Director of the Center for Philosophy of Science at the University of Minnesota. In addition to many papers in the philosophy of science, he is the author of UNDERSTANDING SCIENTIFIC REASONING (4th ed 1997); EXPLAINING SCIENCE: A COGNITIVE APPROACH (1988); and SCIENCE WITHOUT LAWS (1999). He has also edited several volumes of papers in the philosophy of science, including, most recently, Cognitive Models of Science (1992) and Origins of Logical Empiricism (1996). Professor Giere i...