 6. Since the goal of transcendental philosophy, for the Neo-Kantians, is to identify those elements within some part of human culture that are necessary for its objective validity, they were also led to investigate the nature of objective validity itself (Natorp 1887, Rickert  1915).[8]  The two schools construed the question of objective validity differently. The Marburg philosophers emphasized objectivity, and gave an account of objectivity in terms of constant laws (see  section 2.2).  The Southwest Neo-Kantians emphasized the question of validity—specifically the validity of values  (section 3.2).  For both schools, a central issue in the investigation of objective validity is the question of transcendence: what does it mean that the object is independent of our knowledge and provides the standard for its truth?