Hooberus,
I'm not sure where you get the idea that just because knowledge of a fact predates the formation of the theory explaining said fact that the theory could not be falsified if the facts happened to be different.
Is Relativity not falsifiable because the planetary motions it predicted had already been observed? For example:
For years scientists struggled to explain the strange orbit of Mercury using Classical Newtonian calculations, but they never worked out right. Enter Relativity - the calculations were done using Einstien's method and the new theory matched the observation perfectly. If effect, Relativity had 'predicted' the orbit of Mercury would be different than Newtonian calculations indicated, though this fact had already been known for years.
If the Relativistic calculations did not match the already observed irregularities of Mercury's orbit then it would have been falsified as a more accurate model than Classical physics.
Likewise, if there were no recorded changes of life in the fossil record, Evolution would be immediately falsified. Creation would not. There is no falsification for creation theory.
Edited to add:
I'm having trouble figuring out the practical difference in these two statements:
I never wished to imply "that because certain higher level theories have had to have been modified that the general theory is not falsifiable"
My point is that the general theory of evolution is not falsifiable because no matter what happens to higher lever theories, the general theory will survive.
Falsification of the theory depends of lower level facts that support the theory, not higher level theories built on top of it.
Edited yet again to add:
When we talk about the 'general theory of Evolution' what we are really talking about is the theory of Common Decent. The Nested Heirarchy of organism relatedness observed in nature is critical to Common Decent. The fact that new species we find and classify even to this day fit this pattern reinforces the predictive power of this theory. Instead of the theory of Common Decent being destroyed by newly discovered DNA evidence at the time, it was confirmed. This prediction is amazing considering the countless other possible ways things could have turned out to be. This, by the way, was confirmed many years after Darwin had already died.
rem