  No one, he maintains, would err for the sake of erring. Philosophical tradition in particular provides an object lesson in the movement towards truth, and the elimination of error. Nevertheless, the path forward is not pursued without error because the movement towards higher levels of reflection takes place unevenly. Responses to questions at level A are no longer adequate in form to resolve questions at level B, which inevitably take on new aspects through their application to new circumstances. The role of the philosopher is to distinguish the form of difficulties, which may vary from age to age or generation to generation, and to formulate questions in such a way that it is possible to see both their historical antecedents and the underlying principles to be employed in solving them. The process, however, will never be complete. The same principles will always cry out for application to new cases, and the same struggle to avoid error will ensue.