"The four criteria for evaluating hypotheses are relevant to the distinction between science and superstition. These criteria are adequacy, internal coherence, external consistency, and fruitfulness. But the distinction between science and superstition also involves psychological and volitional elements. It involves such factors as how the observer’s subjective states influence how he sees the world, and how his needs and desires play a role in the formation of his beliefs. Accordingly, to explore the distinction between science and superstition, we must introduce criteria that include these psychological and volitional elements. The criteria we suggest are evidentiary support, objectivity, and integrity."