Philosophy of medicine explores key issues in the health sciences, such as metaphysics and epistemology. The field dates back to ancient times, but scholars have discussed key concepts since the 1800s. In the past, debates have occurred over whether or not there is a distinct field of medicine that can be termed “philosophy of medicine” (e.g., Caplan 1992). Caplan calls medical ethics, bioethics, health policy, and medical aesthetics examples of philosophy and medicine, but he sees the philosophy of medicine to be something quite different. He gives a comprehensive definition of philosophy of medicine, and explains why he believes it is an important and unique area of study: “The philosophy of medicine is the study of epistemological, metaphysical and methodological dimensions of medicine; therapeutic and experimental; diagnostic, therapeutic, and palliative.” In his conclusion Caplan says “The philosophy of medicine as it currently exists fails to satisfy these criteria and, thus, fails to exist as a field of inquiry. The non-existence of the philosophy of medicine is unfortunate. Medicine and philosophy would both benefit from the development of the philosophy of medicine as a field” [1]. But many decades later we see the philosophy of medicine as a well established field with many journals dedicated to studying this field. Added to that the philosophy of medicine had added more knowledge to the philosophy of science and provide an in-depth understanding of explanation, causation, and experimentation, as well as debates over their applications of scientific knowledge.