Mary is 78, widowed, and lives alone. She definitely isn’t the person her kids and grandkids remember: she doesn’t like to go out, is anxious when she does, frequently seems confused, doesn’t respond to questions, or, when she does, responds with off-topic answers. John is 71, married, and lives with his 69-year old wife, Irene. John definitely isn’t himself anymore: he doesn’t like to go out, is anxious when he ...