 This leaves only the possibility that the conditions for belonging to the species are, like the individuating conditions for the species taxon, relational. Lineage-based individuation of a taxon depends on its component organisms being spatially and temporally situated in such a way that the causal processes necessary for the inheritance of traits can take place. In the human case, the key processes are those of sexual reproduction. Therefore, being an organism that belongs to the species Homo sapiens is a matter of being connected reproductively to organisms situated unequivocally on the relevant lineage segment. In other words, the key necessary condition is having been sexually reproduced by specimens of the species (Kronfeldner 2018: 100). Hull suggests that the causal condition may be disjunctive, as it could also be fulfilled by a synthetic entity created by scientists that produces offspring with humans who have been generated in the standard manner (Hull 1978: 349). Provided that the species is not in the throes of speciation, such direct descent or integration into the reproductive community, i.e., participation in the “complex network […] of mating and reproduction” (Hull 1986: 4), will also be sufficient.