Tetrathlon Tetrathlon A tetrathlon (from the numerical prefix "tetra-" meaning four) is a team competition organized by Pony Clubs for its members. It is a variant of the modern pentathlon, without fencing. Thus it comprises the four disciplines of shooting, swimming, riding and running. Ideally, teams consist of four members from one pony club competing against several teams from rival clubs. Competitions are usually held over two days during the summer months. It is recommended that one skill and one endurance phase is completed on each day. For example, shooting and swimming will be on the first day, riding and running
How Are We to Live? proposes five practical ethical rules based on a computer simulation of the Prisoner's Dilemma. He draws on the Golden Rule, and explains how the broad cross-cultural support for it gives it a central role in ethics. Singer elaborates on the reasons for behaving ethically and how they apply on actual everyday life. Singer discusses various philosophical perspectives on ethics, including Christian and Kantian ones. The book asserts that "In a society in which the narrow pursuit of material self-interest is the norm, the shift to an ethical stance is more radical than many people realize." Singer attempts to show how