The phrase "duality of law" refers to the concept that there may be two or more contradictory laws that can be applied to a situation. Synonyms for this phrase may include "ambiguity of law," "conflict of law," "polycentric law," or "multijurisdictional law." These phrases capture the complex and multifaceted nature of legal systems, which often involve conflicting rules and regulations. For example, a company operating in multiple countries may face legal dilemmas where the laws in one jurisdiction may conflict with those in another. These synonyms are helpful for understanding the complexity of legal issues and the potential for contradictions within the law.