Actually no! Lower numbered laws have priority over higher numbers, meaning that if they come into conflict the higher number law can be broken. While the first law says they can’t allow humans to come to harm, the zeroth law basically says that if it’s for the good of the species, they absolutely can kill or otherwise hurt individual humans.
Law 0 is also a derived law rather than a programmed one. Robots with both the three laws and sufficient intelligence that are in a position where Law 1 becomes a catch 22 will tend to derive Law 0.
couldn’t that be inferred from the first law?
Actually no! Lower numbered laws have priority over higher numbers, meaning that if they come into conflict the higher number law can be broken. While the first law says they can’t allow humans to come to harm, the zeroth law basically says that if it’s for the good of the species, they absolutely can kill or otherwise hurt individual humans.
does that happen in the stories?
Yes! I think it is the second story in the book
Law 0 is also a derived law rather than a programmed one. Robots with both the three laws and sufficient intelligence that are in a position where Law 1 becomes a catch 22 will tend to derive Law 0.
That means this is the negative first law
Could also be the 0.9th law.