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Ethics and Moral Principles was a first-year course taught at Starfleet Academy in the 2340s and 2350s.
It had cadets debate that life everywhere was sacred. However, Data failed the course because he was unable to form an argument against the hypothesis, as it was against his programming. Tasha Yar failed the course in 2355 because she was unable to argue for it, having learned on Turkana IV that life was cheap. (TNG novel: Survivors)