Mmm, I think we need a slightly different approach to this...
You can agree that chemistry states very specific causes and effects when it comes to chemical reactions?
And that these reactions are already 'established' regardless of any life on earth? As an analogy, you could take languages, which relies on specific established letters, words and grammar rules?
So, all possible combinations of DNA ever imaginable already has specific results 'alligned' to them?
Hence, what is relevant is only the way DNA is arranged? Similarily, the only way a book is made is by arranging already existing letters and words into specific structures?
Therefore, all evolution does is, by trial and error, test slight random chemical reactions until it finds one that works well enough? For example, you can write a new book which is different than anything ever written before without having to invent new letters.
It's the functions, or structures, that are important. If an organism can do something it's parents couldn't do, a new function has obviously been added. You could say that the potential for ALL functions is already present in all organisms, but not all are realized at one time. It's the realization, and the process of weeding out the useful realizations, that is the deal here.
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