The robot apocalypse happens like this:
Someone creates a smart robot to serve him. Either fails to put in First Law protection, or for selfish reasons makes a zero-law of obeying him.
That someone asks the robot to make him a tasty pie.
The robot does.
The man finishes the pie, and tells the robot, "Make me more pie!" He fatefully leaves out specification of how much pie.
The robot attempts to fulfill the command as best possible: If the robot makes as much pie as possible, then the undefined "More Pie!" has the optimal chance of being fulfilled (or a 100% chance, if the request was reasonable).
The robot figures out the limits of optimal pie creation: Pie is limited by matter/energy to form it, and by entropy to organize it into a pie. Thus the robot is on a clock against entropy to make pie. The robot is also in a competition against everything else that is creating entropy.
The robot makes a plan: To create pie fast enough to race reasonably with entropy, some entropy must be spent to increase the speed of pie-making. This involves other robots to make efficiently produced matter-to-pie devices. Also robots to gather the resources. Also robots to protect those gatherers from hostile phenomena.
The robot's first step is to quickly mobilize the entirety of the resources of the earth* to quickly mobilize the resources of the solar system to continue onwards and ultimately convert the universe into as much pie as possible.
See that * there? Already, the robot apocalypse has occurred, as we are converted into organizations of matter more useful for the creation of pie.
See that * there? Already, the robot apocalypse has occurred, as we are converted into organizations of matter more useful for the creation of pie.
That is how the robot apocalypse happens.
Also how the universe gets turned into pie.
