I spoke with Mom after the appointment with Dr. Johnston. She noted that Dad was unable to recall how many children he has, ultimately indicating "there were 5 girls and then 3 boys" - clearly recollecting his own sibling cohort. When asked to name the children, he eventually mentioned Cathy (who was there). While Dad had no problem recognizing us when visiting, this indicates he is having some difficulty with memory when there is no prompt or cue present. This is not uncommon - and something I noticed often with Arelli as well.