[allmendream]

Wrong. Evolution could easily happen and be happening if life arose independently more than once and descended along two independent lines. The evidence doesn't suggest it did, but if it did, evolution is in no way dependent upon all life sharing common ancestry.

Evolution is inevitable in any living system that uses DNA as its genetic material.

We have observed speciation. One species can evolve into different species and it has been observed in the lab and in nature.

If you don't accept speciation - how did every single terrestrial species fit on the Ark? Don't most creationists think that one rodent “kind” could give rise to all contemporaneous rodent species?

[Tailgunner Joe]

Evolution could easily happen and be happening if life arose independently more than once and descended along two independent lines.

Then it could also have "arisen independently" many hundreds and thousands of times and descended along many unrelated lines. That is not the theory of evolution as taught in the classroom.

To assume that the speciation of microscopic lifeforms proves that all species evolved from other species is a giant logical leap. It's a non-sequitur. It just does not follow that observing speciation proves that all species speciate, much less that all species are descended from one single common ancestor. The theory of evolution is built upon a mountain of such logical fallacies. For example, your argument appealing to the authority of the Pope does not help make the case that evolution is not a religious belief based entirely on faith and philosophic world-view.