Lie
Like other ways of fighting, lying can be morally good if done for a good reason. In the Old Testament Bible, Rahab lied about the Israelite spies she had hidden.  The Bible says this was a good thing to do. Usually the term "white lie" refers to small unimportant things.  Justifiable lies could be very big and important, but may still be good. However people should be careful about thinking their lies are good. Other people may see them as bad.