First off, it's a Theory, like the Theory of Gravity or Relativity of Circuit Design. They are all theories.
Second, It's been tested thousands of times and found to be valid without exception. The modern science of genetics is based, in part, of the demonstrable facts of evolutionary theory.
Remember, Newton's Laws of motion were corrected by Einstein's Theory of Relativity.
some are testable some aren't.
This is not true in any way shape or form and represents a severe misunderstanding of genetics and biological science.
The opposite is accurate. Genetics and findings that have come from basic genetics can and are interpreted within a theoretical evolutionary framework.
Your comment is interesting in that it is wrong and to to thextent that it is accurate or coherent it is 180 degress from the actual situation. It's interesting to see it turned around in such a manner and I'm wondering where you read the claim.