> wherever god put the poison, he also put the anitdote
This should be taken as a tendency, not an absolute rule.
The tendency is, of course, caused by the fact that if it's plausible for any species to have evolved digestive mechanisms that allow them to make good use of a food source that's significantly available over a long period of time, then it probably happened, and become widespread.
But you have to consider implementation complexity (why aren't we immune to ALL poisons and disease that have been around for long enough? why don't we all have lifelong 20/5 vision?) vs. time vs. benefit. That, and a lot of things that could have evolved, haven't yet.
This should be taken as a tendency, not an absolute rule.
The tendency is, of course, caused by the fact that if it's plausible for any species to have evolved digestive mechanisms that allow them to make good use of a food source that's significantly available over a long period of time, then it probably happened, and become widespread.
But you have to consider implementation complexity (why aren't we immune to ALL poisons and disease that have been around for long enough? why don't we all have lifelong 20/5 vision?) vs. time vs. benefit. That, and a lot of things that could have evolved, haven't yet.