In their feature article, ‘Moral uncertainty and the farming of human-pig chimeras,’ Koplin and Wilkinson argue that there is a tension between (1) thinking that creating pig-human chimaeras with partly humanised brains as a source of organs for transplantation as morally problematic because of the uncertainty of their moral status and (2) thinking that the raising normal pigs for food is not morally problematic because of the certainty concerning their moral status.