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[first title cards]

Law I / A robot may not harm a human or, by inaction, allow a human being to come to harm.

Law II / A robot must obey orders given it by human beings except where such orders would conflict with the first law.

Law III / A robot must protect its own existence as long as such protection does not conflict with the first or second law.
Isaac Asimov's "Three Laws of Robotics"