I remember reading Robert Zubrin's book "Entering Space" about how to travel in space and terraform planets. In one place he gets into somewhat of a conundrum about robot society, like could robots by themselves live on a planet and "reproduce" To me this is similar to somehwat older idea that one day robots will do all the manual work in the world and people will just relax, do the creative work of thinking etc. Nevertheless Zubrin seems to conclude that it's impossible and that human factor must be invovlved: But isn't this same as saying that we will never have complicated machines because for a machine to be complicated it must have parts made by a machine so that at one point humans have to make a machine that will make a machine. And yet all the machines that we have today have parts that were made by machines, because that treshold from human hand to machine part happened somwhere in the past and doesn't have to happen anymore. We will always have a machine that has parts that were made by a machine. So couldn't robots dig the iron for the parts as well as use the knowledge?