And therein lies the problem. Defining "evolution" is like trying to nail jello to a wall. The theory is always (pardon the pun) "evolving".
The process of defining "religion" has started to look an awful lot like the same kind of process Congress uses to define "interstate commerce".
Then it shows the ignorance of the anti-evolutionists. A theory - by definition - is not fixed! It is a changeable, mutable, tested hypothesis that has not been proven as 100% fact. When that happens (like with mutual attraction of non-zero mass - gravity, or electron mobility in conductors - Ohm's Law) we call it a law.
To expect the theory of evolution to be fixed now and forever is to ignore the root word theory.
This is fundamentally the difference between science and faith; science is an approach, a process, and will see its fundamental tenets change over time because of discovery and testing.
Faith, on the other hand, may be "stressed" but ultimately is untestable as a concrete, tangible process or thing. It is what the believer wishes it to be, and there is no way to change that for it does not rest on observations, nor hard data.