ABSTRACT
The encounter between a man and a woman is not calculated, even if the lovers do sometimes imagine that a force that is beyond them has brought them together. Even more so, if they reproduce, if they mingle their genomes, combining them, there again, in an improbable way. Beyond any programming, the repercussions of experience are continuously being inscribed, modifying what was. The human being is also programmed for errors; as Canguilhem demonstrated, what is characteristic of life is indeed that it is capable of errors. To be subject to language makes humankind a denatured animal, a deprogrammed animal, deprogrammed also from any reproductive programme. For sex, humans have not got a programmed mode, no formula to tackle it with. Desire manages to such an extent that clinicians might question whether assisted reproduction does not introduce an excess of knowledge, an excess of programming with regards to what habitually takes place without knowledge or prediction.
