The dementia diagnoses was a Doctors diagnoses, Rolland mentions Doctors plural. Maybe what you mebtioned was another Doctors diagnoses or an early diagnosis. (I read it- the video has 2 reports beneath it) This was just one of many instances of he and his wife being healed of disease. His son says " my mother and father have been assaulted by more diseases of the developing world than we have means to diagnose. Many times we have had dire warnings from Doctors of their imminent demise. My mother has recovered from more than one incurable disease." (including multiple sclerosis and Rolland had cerebral malaria at one time) The list of external problems is also long including assaults, arrests, beatings, false accusations and many more, In a way the 'label' doesn't matter. It is the healing and the keeping power of God that is exhibited in their lives that is important.)