Substantive due process is a principle in United States constitutional law that allows courts to establish and protect substantive laws and certain fundamental rights from government interference, even if they are unenumerated elsewhere in the U.S. Constitution. Courts have asserted that such protections stem from the due process clauses of the Fifth and Fourteenth Amendments to the U.S. Constitution, which prohibit the federal and state governments, respectively, from depriving any person of "liberty ... without due process of law." Substantive due process demarcates the line between acts that courts deem subject to government regulation or legislation and those they consider beyond the reach of governmental interference. Whether the Fifth or Fourteenth Amendments were intended to serve that function continues to be a matter of scholarly and judicial discussion and dissent.