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The third law does not stipulate how methods should go about specifying any new abstract requirement. The third law functions as a descriptive account of how methods change, and is not responsible for describing how methods ought to change. As such, it is an effective means of explicating the requirements of other employed methods. The Aristotelian-Medieval method is one such example of its utility.
 
In Barseghyan’s explication of the Aristotelian-Medieval method, he illustrates how Aristotelian natural philosophy impacted the method of the time. Most notable is the acceptance of teleology – a theory which states that every thing has a nature it seeks to fulfill (e.g. an acorn’s nature is to become an oak tree). It stood to reason that the nature of a thing can only be intuitively grasped by an experienced person. This fundamental belief generated a method which specifies these requirements known as the Aristotelian-Medieval method, and is an illustration of how employed methods are deductive consequences of the accepted theories of the time.
The third law has also proven useful in explicating such requirements as Confirmed Novel Predictions (CNP). According to the hypothetico-deductive method, a theory which challenges our accepted ontology must provide CNP in order to become accepted. However, the history of CNP has been a point of confusion for some time. By the Third Law, one can show that the requirement of CNP has not always been expected of new theories. When Newton published his Principia, CNP were not a requirement of his professed method, yet they were still provided. On the other hand, Clark’s law of diminishing returns had no such predictions. This is because Newton’s proposal of unobservable entities, such as gravity and absolute space, challenged the accepted ontology of the time, while Clark’s simply accounted for the data already available. Thus, in utilizing the Third Law, one can discover both when certain criteria become an implicit rule and under what conditions they are necessary.

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