The distinguishing mark of a 'manifestly unlawful order' should fly like a black flag.... Not formal unlawfulness, hidden or half-hidden, nor unlawfulness discernable only to the eyes of legal experts.... (The) unlawfulness piercing the eye and revolting the heart, be the eye not
blind nor the heart stony and corrupt - that is the measure of 'manifest unlawfulness' required to release a soldier from the duty of obedience.
Supreme Court of Israel, ChiefMilitary Prosecutor v Melinki and Others, 1962