Please take a look at you post. You actually haven't said anything new.
You don't want to look at this as philosophical concept,OK.
I have said that I want percentages. That is because the pond can function normaly if the amount of things like crap and piss is low enough.
You can also look at the things this way. Would you rather be pond that simply exist or would you rather be fish that has its biological functions.
If some guy take a piss in the pond you live in, it is unavoidable that some of it will enter your body because of process like eating or breathing.
What means that if we are not talking about philosophical concept your choice means that you are Ok with the fact metioned above and actually doubt that you are.
What are you trying to prove?
IT'S POOOOOOOP!!!!! AND FISH PEEEEEEE!!!!! IT'S JUST FEEEEECEEEESSSSS!!!!! I have nothing to prove because I'm JUUUUSSSTTTTT KIIIIDDDDDIIIINNNNGGGGGG!!!!! Really, pretend I said nothing. The only "meaning" in my words were "hey, if you're the pond, you've got detritis in you. That's nasty. THE END."
Now if you don't mind, I'm gonna go take one of these: