Abstract
Decision making and choices are frequent themes in medical ethics. Game theory is based upon modelled decision making. Game theory, and associated logic traps, may have relevance to the clinical practice of medicine and medical ethics. The "prisoner's dilemma" is one logic trap from game theory in which "rational" decision making on the part of participating individuals can lead to "suboptimal" situations. An example of such a situation involving brain death is presented and discussed from the perspective of the prisoner's dilemma.