One argument against the theory of evolution is that it makes claims about events no one’s been able to observe or recreate. The theory of evolution didn’t come out of the blue, you know. The claims it makes are all based on deductions that, in turn, are based on extensive testing.
You see, much like geology and astronomy, evolution is a historical science, which means it’s based on the assumption that natural systems operate the same way now as they have in the past.
The theory of evolution consists of many related hypotheses, each of which makes a prediction about some aspect of the natural world. Some of these hypotheses deal with what’s known as macro evolution, or large scale changes in life. Other hypotheses deal with micro evolution, or the changes that take place within a single species. The theory of evolution sounds pretty extensive, right?.
Extensive enough that there’s no way one key experiment will make it or break it. To knock down evolutionary theory, you’d have to knock down the hypotheses that make it up. It’s wrong to say that the theory of evolution isn’t testable and falsifiable, because the ideas that comprise it can be tested.