A "protected value" (also sacred value) is one that an individual is unwilling to trade off no matter what the benefits of doing so may be. For example, some people may be unwilling to kill another person, even if it means saving many other individuals. Protected values tend to be "intrinsically good", and most people can in fact imagine a scenario when trading off their most precious values would be necessary. If such trade-offs happen between two competing protected values such as killing a person and defending your family they are called "tragic trade-offs."