Les Animaux dénaturés
 Anthropologists travel to Africa to search for the so-called missing link of human evolution. What they find is not a fossil, but an actual population of ape-like creatures, called Paranthropus greamiensis after the discoverer, and dubbed Tropis. A businessman named Vancruysen has the idea to use them as a cheap workforce without rights or pay. The scientists then realize they must come up with a definitive answer to the problem of whether or not the Tropis are human, something they have avoided doing on the grounds that fixing an arbitrary limit between human and non-human is akin to the sorites paradox. They try to use the criterion of interfertility, but it appears that Tropi females can be impregnated by sperm from both man and ape, making it impossible to decide before the offspring reach reproductive age. To force the authorities to reach a decision, thus giving legal protection of the Tropis whether as animals or citizens, one of the scientists deliberately kills the baby born from one Tropi female impregnated by his own sperm. The trial will then determine whether he committed murder, (making the Tropis human) or simply killed an animal.