In terms of the history of philosophy there have been (in general terms) two schools of thought. That is the say, the Rationalists and the Empiricists. The Rationalists identified closely with the metaphysics of the ancient world. Empiricism identifies more with modern science.Kelly wrote:Uwot,
The fact that thinkers, in the beginning, thought to understand the conditions that relate to the existence of both physical things and abstracts concepts were called philosophers is not the point. The point is; soon after these thinkers adapted a systematic method of thinking they were called scientist and those who did not adapt a systematic process of thinking are still called philosophers.
Philosophers can have a systematic process to guide their thinking once they construct comprehensive definitions of the philosophical concepts. I am betting not a single person who identifies with Philosophy will agree with this statement.
kelly
The rationalists are not adverse to starting out with sense experience, but believe that we can go beyond the sensory world in order to define such things as 'reality', 'truth' and 'existence'. Empiricists and to a large extent, modern science, rejects this idea and wants to claim that knowledge begins an ends with experience. The assumption is that only physical things exist.
Unfortunately a rationalist approach flies in the face of science because science always entertains the idea that knowledge is not fixed and that progress can be made via trial and error and the elimination of error. Basically the scientific method.
As Kant pointed out a long time ago; in terms of traditional metaphysics, one can construct a systematic argument for reality just as easily as one can construct a similar metaphysical argument for non-reality. There is no progression because there is no independent way of determining the best argument.