Noun
a doctrine accepted by adherents to a philosophy
Source: WordNetThere are all kinds of sources of our knowledge; but none has authority ... The fundamental mistake made by the philosophical theory of the ultimate sources of our knowledge is that it does not distinguish clearly enough between questions of origin and questions of validity. Karl Popper
Men and women are not free to love decently until they have analysed themselves completely and swept away every mystery from sex and this means the acquisition of a profound philosophical theory based on wide reading of anthropology. . . Aleister Crowley