Abstract

The subject of this paper is the relationship between factual beliefs and moral beliefs, between is-statements and ought-statements. Hume recognizes that a problem exists concerning this relationship. He states the problem in an oft-quoted passage from his Treatise. In their writings, moral philosophers pass imperceptibly from is-statements to ought-statements; and this change is “of the last consequence. For as this ought, or ought not, expresses some new relation or affirmation, 'tis necessary that it shou'd be observ'd and explain'd; and at the same time that a reason should be given, for what seems altogether inconceivable, how this new relation can be a deduction from others, which are entirely different from it”