There is the thesis anti thesis synthesis of Hegel which is one way to get to the truth of things. He gets it from Socrates [as Dr Kelley Ross pointed out] who for some reason was always able to ask the right question to get to the opposite principle than the one that was suggested.   In some of the shorter dialogs this gets to just that--contradiction. In some however progress is made.

And from what I saw in the Logic of the Encyclopedia this is the foundation of his whole system. But he also said there is not just one method of gaining ground in Philosophy. [That is why some have claimed he never had this method.]  

Mainly Hegel wants from this method to get to the conclusion that logic and reason permeates everything, There is no where beyond reason. --For in plain terms God made everything through his wisdom and reason. [That is not how Hegel would put it.] [Hegel also wants that reason can get to absolute truth by itself, not needing empirical evidence]

The reason I bring this up is that the only two areas I have done any study in science are math and physics and in fact progress is never made by the same method that the previous bit of progress was made.

Well obviously areas out from the possibility of experience [not possible experience]: areas that do not come under where when how why the categories. But the categories are not known by the categories- but they are known, Immediately after the Critique was published this was more or less along the lines of the original critics like Schultz.   So what Fries did was to postulate non immediate intuitive knowledge, Though Hegel and Fries were not saying the same thing, but I see this non intuitive knowledge as one more means of getting to the absolute truth in a different way than the dialectic. Just like Hegel had said: there is not just one way.

[fries disagreed  with kant on the transcendental deduction. fries felt that perception can not tell us anything about a priori principles.]