"Ponekad mi se čini da je najupadljivija odlika liberalizma, koja ga odvaja kako od konzervativizma tako i od socijalizma, stanovište da moralna uverenja u vezi sa ponašanjem koje se neposredno ne upliće u zaštićeno polje drugih osoba ne opravdavaju prinudu."
- A robot may not injure a human being or, through inaction, allow a human being to come to harm - A robot must obey the orders given to it by human beings, except where such orders would conflict with the First Law - A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws