You are absolutely right. I was taught that when an individual is dealing with dementia/Alzheimer's you don't argue with them. You let them think whatever trying not to upset them or make them feel a certain way. I've had several family members and individuals I've cared for and currently care for have dementia and I try to interact with them as caring as I can and try to set a pattern if that makes sense. There's a lot of therapies I know nothing about so I'm very curious to learn. The one thing I have found it difficult is that when you are trying to reach a goal or milestone with an individual (whether they have dementia or any other capability) it gets hindered by another person not following or doing something that triggers a behavior which could have been prevented in the first place.