Wait, wait, wait, you're going too fast. This is utterly absurd, but I want to get it straight anyway. Your theory of the evolution of the human race:
1) In the beginning, we came from a far away galaxy where some master race put us on Earth for no apparent reason.
2) We had no teeth and produced no milk back then. We subsisted entirely on water, which put out the flaring fires in our stomachs.
3) We learned magic from the little creatures of the forest.
4) At an indeterminate date in the past henceforth referred to as "the dawn of time", we, after saying the magic words, acquired teeth and began eating meat and vegetables.
5) After an indeterminate amount of time has passed, our bodies adapted to solid food and we could no longer switch back to an all-water diet. Apparently we moved from just putting out the stomach fire to smothering it. We also forgot we had magical powers, but luckily someone wrote it all down in a book you can buy from Amazon.com.
6) We eat food now out of habit, we could stop by just uttering the magic words and drinking a lot of water.
Scribbled in the margins, biology isn't real because it confines the mind, but since chemistry is founded on magic it is. You must believe in physics as well, since you said you had to tweak your theory to make it physically possible. It doesn't matter that there's no evidence supporting the theory, since it all works out in your head and fact-finding would just be a lot of work.