Davidm keeps on semantic details, but doesn't explain how natural selection overcame the problems of probability with hemoglobin molecule.
Also, bear in mind that a hemoglobin molecule is nothing for a human being, you need much more things besides hemoglobin to have a human being.
BTW, Asimov calculated that the total number of human hemoglobin molecules on Earth was 10E31.
Of course, population grew a lot since he wrote that, so the number might be much larger now.
Davidm uses a [quite eristic, I'd say] rhetoric with little ethos, logos and pathos.
He distorts my words as "six second evolution", when I was talking about Cambrian explosion lasting 6 minutes in a 24H scale.
He offers youtube videos (very amusing, I concede) and obscure authors (that even talk about "theorems of natural selection") to oppose my articles from Nature and Scientific American, as well as texts from renown authors like Asimov and Thomas Morgan.
He offers 7-billion (7x10E9) lottery examples against probabilities upwards of 1 in 10E190 (even upwards of 10E619!), forgetting that the total number of atoms in Universe is calculated as 10E80 [how could he produce 10E190 tickets to make a lottery in same scale, given 10E80 atoms only?).
To compose that, he accuses me of misspellings he can't point concretely and of abstract fatal errors he can't substantiate.
And, most of all, he doesn't explain how dumb luck was it to create hemoglobin by natural selection.