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|Formulated Year=2015
|Description=A methodology can affect an employed method when it implements one or more abstract requirements of another employed method. Thus, the role normative methodology plays in the process of scientific change is a creative role, in which methods are changed through the implementation of other abstract requirements from some other employed method.
 
This theorem follows from ''the third law'' which states that a method becomes employed only when it is deducible from other employed methods and accepted theories of the time.
{{PrintDiagramFile|diagram file=Methodology-shapes-method.jpg}}
 
''The third law'' leaves some room for methodologies’ to play an active role in scientific change, specifically, in cases when a ''concrete'' method fulfills the requirements of an employed ''abstract'' method. The same abstract requirements can usually be implemented in a wide range of different ways (e.g. there is a whole array of concrete cell counting methods all implementing the same abstract requirement that when counting the number of cells, the resulting value is acceptable only if it is obtained with an "aided" eye).[[CiteRef::Barseghyan (2015)|pp. 151-152]] In such cases, methodology can play a decisive role in method employment; what later becomes the requirements of the employed method can be first suggested as a methodology. Thus, the double-blind trial method was first devised as a methodology, as a set of explicitly stated rules, and only after that did it become actually employed as a method of drug testing.[[CiteRef::Barseghyan (2015)|pp. 240-243]]
|Resource=Barseghyan (2015)
}}

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