Nomology, the science of the laws of the mind. In philosophy, nomology (from the Greek νόμος, law, and λόγος, reason) is concerned with the thinking process of the mind. The name nomology may come from Aristotle (Aristotle, 1995). The ‘-ology’ suffix implies ‘order’, ‘word’ and ‘reason’, and is about being subjectively reasonable or ‘logical’ as in sociology and psychology. The ‘nom-’ part implies ‘rule’ and ‘law’, and is about being objectively lawful or ‘nomical’ as in economics. A nomological approach requires taking account of both subjective and objective aspects in a decision. Nomology provides the framework for building a nomological network of relationships between constructs in decision making.