Is it OK telling fibs to a person with dementia? The answer is: ‘yes and no’ or ‘it depends’. This is discussed in my book on pages 78-79 and 341-345. Rigid, dogmatic, blanket and insensitive application of ‘Reality Orientation’ or ‘Therapeutic Fibbing’ can be damaging to a person with dementia. But the account of therapeutic fibbing in the link below is helpful and not dogmatic in considering situations where this approach is necessary, indeed essential.
Therapeutic Fibbing: Why Experts Recommend Lying to Someone with Dementia