 There are two fundamental comparative value concepts, namely “better” (strict preference) and “equal in value to” (indifference) (Halldén 1957, 10). These terms are used to express the wishes of persons, but they are also used for other purposes, for instance to express objective or intersubjectively valid betterness that does not coincide with the pattern of wishes of any individual person. However, the structural (logical) properties of betterness and value equality do not seem to differ between the cases when they correspond to what we usually call “preferences” and the cases when they do not. The term “preference logic” is standardly used to cover the logic of these concepts even in cases when we would typically not use the term “preference” in a non-formalized context.