It's just that very often when we judge like that, it later turns out we might have been mistaken. The appendix is a perfect example. I don't know about the sp

It's just that very often when we judge like that, it later turns out we might have been mistaken. The appendix is a perfect example. I don't know about the spine, is it really? Because the whole system looks very optimized for running upright to me, pretty much a perfect running machine.