What moral question does the presence of robots and cyborgs in science fiction most often inspire?

The presence of robots and cyborgs in science fiction inspire the difference between man and machines.

Explanation:

Robots are machines that can execute complex series of actions, programmed by computer, automatically. Recently many robots are involved in human life especially in industry, household, medical, social or entertainment areas, and war.  As the use of artificial intelligence in robotics is studied, there is anticipation that in near future, it will take over human beings.  

Cyborgs are living beings that have organs and mechanical parts that is to restore or enhance  the organisms functioning. Examples are prosthetic limbs, pacemakers, bionic ear implants, implant organs developed artificially from cultured stem cells. Here there is concern that a persons consciousness is changed by integrating machine on to human.  

Science fiction describes about robots that would become well developed having high reasoning skill level, self aware, conscience and emotional. The question then arises as to what makes a human being a human being and a robot as a robot. Does the robot need to be partner with human? Is there a sense of true feeling of the robot to be respected.