I’m reading Gregory L. Murphy and Douglas L. Medin’s 1985 article,The Role of Theories in Conceptual Coherence, from Psychological Review Vol. 92 No. 3. In this paper, they aim to outline the link that exists between theoretical and conceptual knowledge, which, so far, has been rather nicely accomplished through a bevy of valid examples. However, about midway through the paper, around page 296, they use an analogy of the silver dollar…














