This issue could be seen as rather trivial. At each state in its evolution the ecosystem transitions to a new state. The one thing we now can be sure of is that the next state will be just as unique as the previous one, the system will never repeat itself exactly. An event may happen once and never again.
In fact, we did implicitly address this point indirectly in the "Introduction", without putting much attention to it, when we described a situation familiar to most of us: our inability to describe precisely a system without measurements. Meanwhile, not to fall in despair, we may find some satisfaction in the world of propensities. We may not know exactly what happens, but approximately what happens.
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