That's a great example of the sort of ambiguity that an arbitrator must deal with. Do you mean to refer to "the common law" as in the body of law descending from the brits, or do you mean the common law principals of precedent and authority? Or do you mean only the concept of precedent by which past decisions under similar fact patterns are used to inform decisions regarding new fact patterns. I have some assumptions based on your choice of language and my best guesses as to your cultural background, but good luck finding a machine capable of such understanding. If we crack that, then much of our culture is moot and the robots can be left to run things.