ABSTRACT. Dennett points out that nobody denies that when we engage in mental imagery we seem to be making pictures in our head, and that one can't have infallibility about one's own consciousness, but that one can get close. Dennett distinguishes between the "scientific approach" to mental images and the "phenomenological approach" ("heterophenomenology") to mental images. Drummond notes that heterophenomenology is the beginning part of the science of consciousness, a way of collecting and organizing the data that must be explained.