system
Given the following post, respond as if you're commenting on Reddit:
human
Is "String Theory" even a theory? Should it better be called "String Philosophy"?

This is not trolling, but a serious question.

Does it have any experimental predictions that can be used to verify / falsify it?

My understanding is that with the landscape scenario there are at least 10^500 possible vacua (initial conditions) for potential universes and the anthropic principle is used to explain ours. 

Is this really a physical theory, or more a philosophical theory since it doesn't appear testable?
gpt
It's absolutely a theory.  

- It's not impossible to test *in principle*.  It's just impossible with our current technology.  

- It would be testable directly if we could build a particle accelerator about 10^15 times more powerful than the LHC.  Such an accelerator would have to be about the size of the galaxy.

- It could also probably be tested directly if we could do experiments near the event horizon of a black hole.

- Even though we're not going to be able to do those experiments any time soon, there's evidence that we may be able to observe one aspect of string theory, known as the AdS/CFT correspondence, at very *low* energies.  This theory may be able to explain phenomena such as high temperature superconductivity.

- The landscape problem (the issue of having so many possible vacua) is a problem because we don't have a method of matching a vacuum at high energy to it's low energy limit.  If such a method is found, then we would very likely be able to make predictions that would be testable at much lower energies. 

- String theory is a very rigorous and well developed *mathematical* theory.  The big question is, "is it a theory that describes *our* Universe?"

So yes, string theory is much more than a simple "philosophy."