There is often confusion in equating the presence of a written constitution with the conclusion that a state or polity is one based upon constitutionalism. As noted by David Fellman, constitutionalism "should not be taken to mean that if a state has a constitution, it is necessarily committed to the idea of constitutionalism. In a very real sense... every state may be said to have a constitution, since every state has institutions which are at the very least expected to be permanent, and every state has established ways of doing things".