[...] Another subject (and, ultimately, the subject as such) is for Lacan not something directly given, but a ‘presupposition’, something presumed, an object of belief – how can I ever be sure that what I see in front of me is another subject, not a flat biological machine lacking depth?

The Neighbour Thing

This presupposed subject is thus not another human being with a rich inner life filled with personal stories which are self-narrated in order to acquire a meaningful experience of life, since such a person cannot ultimately be an enemy. ‘An enemy is someone whose story you have not heard.’ [...]