  One of Moore's important contributions was to put forward an ‘organic unity’ or ‘organic whole’ view of value. The principle of organic unity is vague, and there is some disagreement about what Moore actually meant in presenting it. Moore states that ‘organic’ is used “…to denote the fact that a whole has an intrinsic value different in amount from the sum of the values of its parts.” (PE, 36) And, for Moore, that is all it is supposed to denote. So, for example, one cannot determine the value of a body by adding up the value of its parts. Some parts of the body may have value only in relation to the whole. An arm or a leg, for example, may have no value at all separated from the body, but have a great deal of value attached to the body, and increase the value of the body, even. In the section of Principia Ethica on the Ideal, the principle of organic unity comes into play in noting that when persons experience pleasure through perception of something beautiful (which involves a positive emotion in the face of a recognition of an appropriate object — an emotive and cognitive set of elements), the experience of the beauty is better when the object of the experience, the beautiful object, actually exists. The idea was that experiencing beauty has a small positive value, and existence of beauty has a small positive value, but combining them has a great deal of value, more than the simple addition of the two small values (PE, 189 ff.). Moore noted: “A true belief in the reality of an object greatly increases the value of many valuable wholes…” (199).