Chapter 1: Moral Reasoning in Bioethics – Ethics, Principles & Arguments

The text outlines the major branches of ethical inquiry, including descriptive ethics (the empirical study of moral practices), normative ethics (the search for justified moral standards), metaethics (the analysis of fundamental moral meanings), and applied ethics, where bioethics operates by resolving practical issues in medicine and healthcare. Moral norms are distinguished from nonmoral norms (like law or etiquette) by their characteristics of normative dominance (overriding other norms), universality, impartiality, and reliance on reasonableness. The chapter introduces five core prima facie principles essential to bioethics: autonomy (respecting self-determination, especially via informed consent, balanced against the harm principle and paternalism), nonmalefcence (the duty to avoid unnecessary harm, demanding due care), benefcence (the duty to actively do good and remove harm), utility (the maximization of the favorable balance of benefits over harms for all concerned), and justice (ensuring fair distribution of advantages and disadvantages, contrasting libertarian and egalitarian views). The text thoroughly challenges ethical relativism (both subjective and cultural) by demonstrating its logical inconsistencies, such as implying moral infallibility, undermining moral progress, and failing to justify universal tolerance. Furthermore, it addresses the Divine Command Theory and the Euthyphro dilemma, concluding that morality is logically independent of religious commands. Finally, the chapter details the components of moral arguments (premises and conclusions), differentiating deductive (aiming for sound, conclusive support) from inductive (aiming for cogent, probable support) reasoning, and warns against common psychological obstacles to critical thinking, including confirmation bias, motivated reasoning, the availability error, and the Dunning-Kruger effect.