‘Thou shalt not lie’; ‘the truth, the whole truth, and nothing but the truth’. Both morality and the law contain clear statements about the importance of veracity. Yet, as Ginny Russell so eloquently describes, based upon personal experience with her mother in the UK, truth telling in dementia is fraught with problems. The problems are not only ethical, but can also be practical and emotional. They can arise on a daily basis for the family and friends of people with dementia, as well as for care staff and professionals.