I have had several relatives who had dementia...my maternal grandmother and great-grandmother; my mother's sister, who passed away three years ago from Alzheimer's, and most recently a great aunt who also passed away from a fall while in a nursing home in Indiana who also had Alzheimer's. It was impossible NOT to have to lie to them to get them to do what they needed to do. I believe that if the intent is to help in situations like this, to protect them from themselves, it's perfectly acceptable. I mean, Christian parents lie to their children and tell them that there is an Easter Bunny, Santa Claus, elves, and flying reindeer, though, for the children I don't believe parents should be doing this...but, it's up to them on how they raise their children, and it isn't like it is with grown people who are suffering from a brain-killing disease.