|Naturalistic fallacy: is described as the error to infer from being to what should be. From the fact that something is the way it is, cannot be concluded that it should be like this. The expression comes from the Principia Ethica by G. E. Moore (1903), but the problem goes much further back and has already been pre-formulated by G. Hume in his “A Treatise of Human Nature” (1738-40). Another name for the problem is the is-ought problem._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments.