The manifest image is not fixed or static; it can be refined both empirically and categorically.  Empirical refinement by correlational induction results in ever better observation-level generalizations about the world.  Categorial refinement consists in adding, subtracting, or reconceptualizing the basic objects recognized in the image, e.g., worrying about whether persons are best thought of in hylomorphic or dualistic categories or how things differ from persons.  Thus, the manifest image is neither unscientific nor anti-scientific.  It is, however, methodologically more promiscuous and often less rigorous than institutionalized science. Traditional philosophy, philosophia perennis, endorses the manifest image as real and attempts to understand its structure. 