Is honesty always the best policy, or is it OK to tell a lie under certain circumstances?”
They were covered under “tact”. If you were invited to a friends house, and fed a meal that was made up of food that was less than your favorite, etiquette demands that you still eat a little of everything and complement your host. Your complement is not a lie, even though you did not enjoy the food. It is a “tactful complement” which was allowed under the Honor Code. That also applies when your girlfriend asks if she looks fat, and other similar cases. In every other case, honesty is the best policy. Now, there is honesty, and then there is being brutally honest. Most times, the truth can be presented in a way that the hearer can understand that no insult was meant. There are always exceptions, but these are rarer than most people seem to think. There was a case a violation at the Academy where the sibling of a cadet was injured and needed emergency surgery. The parents of the sibling and cadet were out of the country and could not be contacted. The surgery required parental approval,