I agree, my original question asked if there was proof, when I should have asked : Is there experimental evidence that supports the many new theories such as string theory.
I agree that a consistent theory is a great place to start. But at some stage it surely needs experimental support e.g when...
Quantum theory, although hard to understand with intuition has a lot of experimental proof. Do the more modern theories e.g. String theory, or black hole theories have any experimental proof, or are they theories that the mathematics have led to?
Without proof, do they deserve so much credit...