A biologist I admire, Bret Weinstein, employs a four-part test to determine whether a trait is the product of evolution. https://www.youtube.com/watch?v=DtdOhBoZfNg Is it complex? Does it have a cost? Is there variation in the amount of cost that is spent? Does it persist over evolutionary time? If a trait has all of those characteristics, then … Continue reading The errors with Bret Weinstein’s four-part test of adaption →