Niche exclusion principle

In biology, a principle called the niche exclusion principle is of particular interest here. The principle may be slated as follows ... 

Niche exclusion principle In a competition between species that seek to exploit the same niche, only one species survives. 

The contextuality of meaning may be called a principle , for it is neither a brute fact nor a law of nature. But exactly what is meant by a principle is hard to specify. We can give some familiar examples of course. In ecology there is the well-known competitive exclusion principle , which explains why organisms occupying exactly the same niche cannot coexist for more than a brief period of time. In logic we all use, whether we know it or not, the principle of contradiction , which states that two propositions that really contradict each other cannot both be true. And since, by implication, at least one of them must be false, we justify the kind of hypothetico-deductive scientific... 

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