A Wikipedia cita extensões de outros autores para as "Três leis" canônicas da seguinte forma
There are two Fourth Laws written by authors other than Asimov. The 1974 Lyuben Dilov novel Icarus's Way (a.k.a. The Trip of Icarus) introduced a Fourth Law of robotics:
A robot must establish its identity as a robot in all cases.Dilov gives reasons for the fourth safeguard in this way: "The last Law has put an end to the expensive aberrations of designers to give psychorobots as humanlike a form as possible. And to the resulting misunderstandings..."[29]
For the 1986 tribute anthology Foundation's Friends Harry Harrison wrote a story entitled, "The Fourth Law of Robotics". This Fourth Law states:
A robot must reproduce. As long as such reproduction does not interfere with the First or Second or Third Law.In the book a robot rights activist, in an attempt to liberate robots, builds several equipped with this Fourth Law. The robots accomplish the task laid out in this version of the Fourth Law by building new robots who view their creator robots as parental figures.[30]
A fifth law was introduced by Nikola Kesarovski in his short story "The Fifth Law of Robotics". This fifth law says:
A robot must know it is a robot.
Meu interesse é principalmente focado na primeira das 4ª leis (4a se você preferir) e na 5ª lei.
Asimov ficou ciente dessas extensões durante sua vida e há alguma evidência documentada para apoiar qualquer opinião que ele tivesse sobre elas?
No entanto, ele nunca menciona nenhuma lei adicional (exceto sua própria Lei Zeroth). Dada a sua atitude de preferir que outros autores não citassem suas Três Leis, mas apenas as assumissem, acho que ele NÃO daria sua aprovação oficial a quaisquer acréscimos às suas Leis.