Okay can you list the number of things that
1) Philosophy has solved (For example, if philosophy has solved ethics, we should expect there to be consensus on something or some real world effects that extend beyond "oh there's this egghead who said this thingie")
2) Is not incorporated outside of philosophy or incorporated in such a way that it's strictly inferior to philosophy's conception of it (A counterexample would be Kantian (??? Not sure) versus the General Relativistic conception of space)
3) Is important in contexts beyond simple rent-seeking or status jockeying within academia?
The only thing remotely coming to mind right now is the philosophy of cognition, whose practitioners resemble neuroscientists more than philosophers. I can't name anything right now where I would go "Gee, I sure wish we had more philosophers in areas X, Y and Z" as opposed to, let's say, computer scientists, artists, engineers, business people, lawyers or historians.
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