Two things strike me reading through this thread.
1) Who *was* supposed to eat the fruit from the tree of life and from the tree of the knowledge of good and bad? Did god create two distinct species of trees purely to test his human creation who had no concept of the consequences of failing the test? Isn't that a waste of good fruit? doesn't it go against the whole ethos of the creation tale of things being created male and female according to their kind?
2) Where are the trees now? They must have been self-fertilising as they produced fruit even though there was only a single specimen of each. So that fruit would have fallen to the ground, been eaten by animals (who then get to know good and bad and live forever??) and more trees of life and knowledge would then grow from the seeds. In this day and age there should be forests of trees of life and of knowledge.