A scientific theory is a good theory if it satisfies two requirements: It must accurately describe a large class of observations in terms of a model that is simple enough to contain only a few elements, and it must make definite predictions about the results of future observations. For example, Aristotle' s cosmological theory, which claimed that everything was made out of four elements -- earth, air, fire, and water -- satisfied the first requirement, but it did not make any definite predictions. Thus, Aristotle' s cosmological theory was not a good theory. If all the statements in the passage are true, each of the following must also be true EXCEPT: ['Prediction about the results of future observations must be made by any good scientific theory.', "Observation of physical phenomena was not a major concern in Aristotle's cosmological theory.", "Aristotle's cosmological theory described a large class of observations in terms of only four elements.", 'A scientific model that contains many elements is not a good theory.']