But a more common approach is to see philosophy not as a fully developed science on its own but as an immature or preliminary science. Georg Simmel, for example, sees it as a provisional science studying appearances. On this view, a field of inquiry belongs to philosophy until it has developed sufficiently to provide exact knowledge of the real elements underlying these appearances. Karl Jaspers gives a similar characterization by emphasizing the deep disagreements within philosophy in contrast to the sciences, which have achieved the status of generally accepted knowledge. This is often connected to the idea that philosophy does not have a clearly demarcated domain of inquiry, in contrast to the individual sciences: the demarcation only happens once a philosophical subdiscipline has reached its full maturity.
