@doonxib @judgedread They're only functional additions because all the 99.9% fatal mutations are weeded out by natural selection, leaving only (or mostly) the beneficial mutation in the gene pool. And looking back 500 million years, with all the harmful mutations long gone, one might therefore be tempted to say "hey, what a fucking coincidence that all these beneficial traits just happen to pop up in the gene pool in the right order and with the right timing to produce the human eye."

The assumption of intent is left out because the theory of evolution by natural selection works fine without that assumption, same way as Newtonian mechanics does away with the necessity of having angels pushing the planets around.