 In Whitehead’s philosophy, every actual entity has a physical and a mental pole. For this reason, Whitehead speaks of actual entities as “dipolar” (thus, a second meaning of the word). The physical and mental poles are aspects of every real being (actual entities) but they are not real beings themselves. In other words, Whitehead is not a mind-body dualist. It is also important to note that, for Whitehead, human consciousness is a higher form of mentality but not the only form. Thus, Whitehead does not claim that every real being is a conscious entity. As with Leibniz, Whitehead recognizes a continuum of mind-like qualities ranging from very primitive feelings to the most advanced form of self-awareness. Whereas Leibniz speaks of every real being—he calls them monads—as having apperception and appetition, Whitehead speaks of every actual entity as prehending, or grasping or taking account of, its environment and as striving to realize the subjective aim of coordinating its prehensions in some determinate fashion. In Process and Reality, Whitehead uses the word “feeling” as a synonym for prehension to indicate the vector character of feelings—a feeling is always a feeling of something. Whitehead’s belief in a continuum of mental qualities fits neatly with evolutionary theory where it is commonplace to conceive differing forms of organic complexity as associated with differing levels of mental capacity. For example, the frontal cortex of a human brain allows for more advanced mentality than one finds in a chimpanzee, whose brain is not as complex.