There's little point in debating (if you can call it that) with zealous, uneducated fundies like SD. He's been mind-******. Each of his statements is patently absurd, and each would require half a page (at the least) to sort out even superficially. That's too much of a hassle for me, and I fruitlessly expended my energy on it back when I was on AOhelL, to no avail. That's why I roll my eyes and walk away.
I do want to point out one thing, however. In science, "theory" is not defined as simply a hunch or a guess -- that is the colloquial usage of the word. In science, a theory is defined as an explanatory model based on a veracity of empirical, predictable, experimental, reproducible evidence. In science, a theory is as good as it gets -- colloquially, it's as good as a fact.
Evolution is both fact and theory. Fact: evolution happened and continues to happen. Theory: how it happened and continues to happen.
Gravity is "just a theory." Germs are "just a theory." Plate techtonics is "just a theory." Etc., ad nauseum. Fact of the matter is, evolution is arguably the most extensively verified natural phenomenon there is, even more than gravity; likewise for the theories supporting its occurrance. It undergirds all of biology, as well as numerous other fields. Nature and science don't make sense without evolution.
I'm done.