Re:Evolution random elements. (Score 2)

This isn't quite how it works: "So if it's explained by selection pressure, it's evolution. If it's explained by lack of selection pressure, it's evolution. Go falsifiability!" It's not evolution itself that is being tested but rather the particular evolutionary mechanism. Most people assume that adaptation -- evolution by natural selection -- is the only way that evolution works. Not the case, as jellomizer points out correctly. So we test to see which, if any, of the different mechanisms are likely to be working. Since we are using robots, though, we can never say for certain what happened. We can only point to the more or the less probable.