but today we are confronted with a new and frightening possibility , which is that we have actually created our own successors , that we have built a machine that does not know it is a machine , that demands to be recognized as an autonomous individual with the rights and privileges of a human beingand which , by virtue of its inherent mechanical superiority , its physical durability and strength , its cunningly designed positronic brain , its bodily near-immortality , might indeed , once it has attained those rights and privileges , begin to regard itself as our master !