In recent years political, religious, and scientific communities have engaged in an ethical debate regarding the development of and research on embryonic stem cells. Does the manipulation of embryonic stem cells destroy human life? Or do limitations imposed on stem cell research harm patients who might otherwise benefit?John Lynch s What Are Stem Cells? identifies the moral stalemate between the rights of the embryo and the rights of the patient and uses it as the framework for a larger discussion about the role of definitions as a key rhetorical strategy in the debate. In the case of...