But it doesn't destroy non-empiricist philosophy, that's true. I would have singled that out if I knew you were positing a priori categories or conditions of knowledge. — Leontiskos
I have sympathies, but just like I do with any other philosopher -- there's a with the grain and against the grain, and I think Kant's categories fall to the absurd.
So even here, the story moves on... even with Popper, the story moves on. Eventually I end this story with Feyerabend wherein "anything goes", but if you pay attention that's more a slogan than his whole critique.
But, knowledge-first: We know things. How do we know things? I take it that Feyerabend demonstrated the impossibility of building a science of science from axioms or what-have-you in the vein that Popper was doing. So if we know things, and some of those bits of knowledge are scientific, and we have to learn how to learn scientific knowledge (which I think we do), then there must be some other kind of knowledge other than science. For me I turn to current practice, and history (or, really, just "history" properly understood) to answer that question: So there are at least two kinds of knowledge, science and history.
What I notice there is that there isn't some set number of
a priori categories -- there are conditions of knowledge, but they change with time and practice and even practitioner. And I don't think that they construct experience, ala Kant, but I take the underdetermination of theory/overdetermination of evidence as a true description of science -- it's a "real" philosophical problem, but as per rule 1 solving it won't destroy all knowledge.
So the quest for an all-encompassing philosophy which tabulates all the categories of knowledge I take to be impossible to fulfill, given that the
a priori categories are more assumptions that block out problems so that research may continue (not get overwhelmed by multiplicity). Rather, we have many philosophies, several categories, and even different ways of organizing thought that's not so obsessed with categorical methodology, or with proving oneself right. Hence the notion that philosophy is like a garden or a forest -- with a garden you've cultivated it, but there's some structure there and we know how it grows, and with the forest it's more "in the wild", waiting to be discovered, cut down, replanted, re-invented and so forth. Of course we're not separate from this forest or garden -- and really I'm still talking about ideas here, I just think they move and have a life of their own -- so we can effect how it looks over time as it effects our thoughts too.
Except I don't think that's anywhere close to true. Aristotle accurately and charitably characterizes his opponents before answering them. You've not done that. Here is an example: — Leontiskos
Eh, fair.