Dear Ex-Marine, It was wholly a pleasure to be told again that there is no such thing as an ex-Marine or former Marine -- because once a Marine, always a Marine. The same principle applies to judges, physicians and military officers. Semper Fi and all that -- always faithful. But what about those Marines who aren't always faithful? How else refer to, say, Lee Harvey Oswald except as a former Marine? What happens to those Marines who are court-martialed and dishonorably discharged? Surely they are ex-Marines -- and deserve to be. The phrase you object to appeared in an obituary...