Nietzsche solved philosophy; everything since has been quibbling over semantics, there is no original thought anymore. Whereas physics’ Nietzsche was Newton, and there have been continuous advances since his time.
Maybe in the sense the Von Braun solved rocketry. I agree that everything that has come since have been refinements to Nietzsche's developments (dare I say models) but those refinements have brought about the real-world application of philosophy more than Nietzsche ever did.
See Mao, or Popper, or even though I can't stand the guy Chomsky.
Nietzsche and Wittgenstein worked to show many (most) of then current philosophical problems weren't. Bias and language were such a big part of problems that when substracting them, they were rendered hollow. So the subject, as it was until XIX century, could very well be called a problem and yes, it was solved.
Sure, if you totally reframe the entirety of what it means "to solve philosophy" to mean what you said, then gaius's comment makes sense.
I'm not sure I agree that solving a lot of the then/now "problems" with philosophy is the same as solving the entire field of philosophy. Especially since it requires mobile goalposts.
Also, it's a hilarious and an absurd claim "x Solved Philosophy" because that's like saying "Tony Hawk solved the skateboard." Perhaps Tony Hawk is great at skateboarding, but you can never personally know what it's like until you try yourself. Philosophy is not something that can be solved by someone outside of yourself, not even Nietzsche can wipe away your ignorance, only you can do that for yourself.
No. I suppose when you say "nothing" you're talking about philosophical propositions, which can be mapped to computer programs. In which case we can note that (1) the vast majority of programs have never been generated before by any process and (2) the vast majority of possible programs cannot be reduced to simpler programs that might have been expressed earlier.
Who said anything about computers? The whole universe is in a constant state of Recycling. Remember that old adage "energy/matter cannot be created nor destroyed?"