From post 1779:
3)How evolutionary scientists can continue to claim that species develop into new and completely different types of species (I'm talking the big leaps over large amounts of time from say ape to human), when this kind of mutation of genetic material has never been observed ...
Two posts of yours discuss the same issue ... the presumed limit on the mutation process (a blocking mechanism) which confines all of nature to mirco-evolution while preventing macro-evolution. This is a rebuttal of that notion I posted nearly 2 years ago:
One might argue that the fossil record, starting with simple forms and progressing over time to apparently related yet ever-more mutated variations, powerfully illustrates the non-existence of such a "blocking mechanism." But even though it seems not to exist, we should keep an open mind. If such a blocking mechanism actually does exist, let's not worry too much that it hasn't been found yet, because these things take time. Yet, if we are ever to actually find such a mechanism, it's still necessary to propose an hypothesis as to what it might be, so that we know what to search for.
Think about it. The blocking mechanism has to be something that strictly limits the number of mutations in all of a creature's genes that might otherwise occur over time. The mechanism would need to keep track of how many variations had already occured (from some "standard model" which is memorized somehow) and then guard against any more. What is the nature of this mechanism? Is it a radiation shield to prevent background radiation from altering the DNA? Is it a "perfect copy" mechanism that suddenly prevents DNA from faulty replications? How would it work? How could we test for it? Do we find some "already maximum mutated" creature and zap them with radiation to discover the "DNA shield" that has suddenly manifested itself to make the creature "mutation proof"? Does such a mechanism make any sense, now that I've discussed a very few of its problems?