and Fechner. Wundt followed Kant and warned against a primarily metaphysically founded, philosophically deduced psychology: "where one notices the author's metaphysical point-of-view in the treatment of every problem then an unconditional empirical science is no longer involved – but a metaphysical theory intended to serve as an exemplification of experience." He is, however, convinced that every single science contains general prerequisites of a philosophical nature. "All psychological investigation extrapolates from metaphysical presuppositions." Epistemology was to help sciences find out about, clarify or supplement their metaphysical aspects and as far as possible free themselves of them. Psychology and the other sciences always rely on the help of philosophy here, and particularly on logic and epistemology, otherwise only an immanent philosophy, i.e. metaphysical assumptions of an unsystematic nature, would form in the individual sciences. Wundt is decidedly against the segregation of philosophy. He is concerned about psychologists bringing their own personal metaphysical convictions into psychology and that these presumptions would no longer be exposed to epistemological criticism. "Therefore nobody would suffer more from such a segregation than the psychologists themselves and, through them, psychology." "Nothing would promote the degeneration [of psychology] to a mere craftsmanship more than its segregation from philosophy." System of philosophy Wundt claimed that philosophy as a general science has the task of "uniting to become a consistent system through the general knowledge acquired via the individual sciences." Human rationality strives for a uniform, i.e. non-contradictory, explanatory principle for being and consciousness, for an ultimate reasoning for ethics, and for a philosophical world basis. "Metaphysics is the same attempt to gain a binding world view, as a component of individual knowledge, on the basis of the entire scientific awareness of an age or particularly prominent content." Wundt was convinced that empirical psychology also contributed fundamental knowledge on the understanding of humans – for anthropology and ethics – beyond its narrow scientific field. Starting from the active and creative-synthetic apperception processes of consciousness, Wundt considered that the unifying function was to be found in volitional processes and the conscious setting of objectives and subsequent activities. "There is simply nothing more to a man that he can entirely call his own – except for his will." One can detect a "voluntaristic tendency" in Wundt's theory of motivation, in contrast to the currently widespread cognitivism (intellectualism). Wundt extrapolated this empirically founded volitional psychology to a metaphysical voluntarism. He demands, however, that the