Comment Re:The answer is... (Score 1) 255
They make some falsifiable predictions. We can apply selective evolutionary pressure to viruses and observe useful results, and do it repeatedly. We can interbreed and predictably speciate horses. But we cannot falsifiably predict that a single-cell organism will evolve into a horse under certain conditions, with a known set of evolutionary steps along the way. That doesn't stop us from looking at fossil records and trying to inductively trace back where horses came from and what conditions led to them and what the intermediate steps along the way were. And we still call it science.
With cosmology, we have billions of snap shots of different structures at different points in their lives, and we can look at them and say, "We think these are different stages of the same cycle." So we create a model. And we say, "If this model is correct, we would expect to find X somewhere." And then if X turns up, that increases the probability that the model is correct. But we can't create a universe and observe its evolution for 14 billion years. That doesn't stop us from creating models of how stars and planets and galaxies form, and we still call it science.