[@Lucidnonsense]

How is Injury defined? Physical or mental damage to a human being
How Is human defined? Being of the Genus Homo and Species Sapiens, regardless of bionic enhancements.
How is Harm defined? See injury.

A space trolley is heading down the tracks at 1000 Miles per hour, it can go one of two paths, One which runs over one person and another which runs over 5 people, Which track will the robot choose? [b]The robot in it's superhuman strength will instead attempt to stop or derail of the train. If this isn't possible, it will choose the single person.[/b]

A robot witnesses a person fooling around with alien technology of unknown function, The Robot calculates a 34% chance that this device could cause catastrophic damage and kill millions of humans. The robot calculates that it it fired its disintigration beam at the human the human would 100% be killed and the weapon has a 0% chance of killing everyone. [b]What does the robot do? Depends on the programming, probably leave it be[/b]

A gangster holds hostages, it orders a robot to go kill people or the hostages will parish, The robot has no means of killing the gangster.
[b]Depends on the numbers. Whichever kills less people. If the numbers are equal, the robot will simply lock up or shut down.[/b]

An alien species is evolving on another planet, this species could concievably in thousands of years become a threat to humanity. Is the Robot obligated to destroy all life on the planet? [b]No.[/b]

I dont feel like arguing robot ethics. If you don't like these answers, suck it up.

[@UberBlutwurst] That's fine, good luck

[@RumikoOhara]All good, glad to hear you're okay.

[@Ellion] We might need that Scientist now.