 Taking this second line in turn raises two questions: first, in what sense are the properties thus picked out specifically “human”, if they are neither universal among, nor unique to species specimens? Second, in what sense are the properties “natural”? Naturalness as independence from the effects of human intentional action is a key feature of the original package (TP1). Whether some such conception can be coherently applied to humans is a challenge for any non-classificatory account.