a robot may not injure

In early before asimov put forward three treat robot principle, namely the first principle: a robot may not injure a human being or, because of not as of humans were hurt; The second principle: unless against the first principle, the robot must obey mankind command. Third principle: unless against the first principle or the second principle, a robot must protect its own existence. Later, asimov again for the three principles added a premise that stage principle: a robot may not injure a human entirety, or because the omission of humans overall damage.

Later someone increased robot fourth principle: a robot must breed, as long as the breeding does not violate the first principle, the second principle and the third principle, Step5 principle: a robot must know oneself is a robot.

All these things, but is to remind us in understanding the different forms of life and can create artificial life, humans should know how to respect life and to other life coexistence.