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What makes a theory good? How to evaluate a new theory?

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Please explain what makes a theory a good theory and how you would know if a new and emerging theory was good, including how you would evaluate a new theory. Could you please be specific and provide examples?

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Just a brief response (194 words) suitable for a discussion board or to get you thinking in this direction. Clear and practice comments in everyday language. Gives example from article. Not enough materials for a paper length treatment on this topic.

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A good theory has to be testable. In other words, it must be possible to gather data and test the theory and determine if the observations refute the theory. In other words, a theory must exclude certain outcomes and so if those outcomes occur, the theory is disproved. Every genuine ...

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