| The problem is that in science, the exception negates the rule. There can be no "exceptions" to a scientific theory. You provided an example which may indeed be correct, but I have no doubt that I can find two organisms of different "species" that can produce fertile offspring under certain circumstances. If I had the funding, I would attempt to find such an exception, by doing things like feeding different diets. However, the point is that what can maintain scientific rigor is the molecular-level mechanism (s) of usual exclusion. The notion of "species" is a great aid to those doing practical research, but you don't realize that you are arguing tautologically. For example, if I did my experiment, you would then claim that the two organisms really were the same species, somehow. And this is what leads to "bad science," and allows critics of science to say ridiculous things like, "see, scientists have been proven to be wrong about things they thought were undeniably factual." In reality, this situation occurs because scientists don't follow the scientific method. |
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