In addressing the question of whether legal reasoning is distinctive, Frederick Schauer emphasizes the formality and rule dependence of law.
When taking the words of a statute seriously, when following a rule even when it does not produce the best result, when treating the fact of a past decision as a reason for making the same decision again, or when relying on authoritative sources, the law embodies values other than simply that of making the best decision for the particular occasion or dispute.
In thus pursuing goals of stability, predictability, and constraint on the idiosyncrasies of individual decision-makers, the law employs forms of reasoning that may not be unique to it but are far more dominant in legal decision-making than elsewhere.