If fish don’t exist, what else don’t we know about our world? What other truths are waiting behind the lines we draw over nature? What other categories are about to cave in? Could clouds be animate? Who knows. On Neptune, it rains diamonds; it really does. Scientists figured that out just a few years ago. The longer we examine our world, the stranger it proves to be. Perhaps there will be a mother waiting inside a person deemed unfit. Perhaps there will be medicine inside a weed. Salvation inside the kind of person you had discounted.