We search an answer to the following moral questions: "Is abortion allowed or not?" or "Is it allowed to use embryos for research or not?" We want to find one clear answer to our questions. Can we hope to find an answer? With reference to an answer we know some different moral theories. A cognitive philosopher doesn't see a difference between facts and values. He says that moral values are facts and there is a right answer to every moral question. In different theories moral facts are established in intuition, in moral feeling or in common sense. A non-cognitive philosopher denies this position. David McNaughton said that cognitivism and noncognitivism are our two best moral theories. Both positions with some greater differentiations will be explained
