Orson Scott Card Quote

Reason, here being conjugated into reasonable is that which distinguishes “truth from falsehood, and right from wrong; - Reason is called the soul of the law; for when the reason ceases, the law itself ceases.” (Bouvier’s Law Dictionary) “Argument” would here simply describe a meaningful discussion. The arbiter is: “a person or agency whose judgment or opinion is considered authoritative.” (Merriam-Webster Dictionary)

Sillik, to your question; the individual referenced as an unreasonable character that relies on authority (by example, a religious zealot, a government figure, an academic with positive law accolades, a politico with the greatest perceived force at hand, any combination thereof, etc.) rather than nature’s law, truth or fact is a very identifiable character. Such arbiter is well illustrated by a theocratically indoctrinated socialist. Said socialist unreasonably relies solely on his priesthood dogma as a moral correctness instead of reasoning on the basis of the “soul of the law”.