He gets very angry when told he is at home & this is where he/Mom have lived for 68 yrs. He continually says NO he knows he lives at 1442 Louis st & this is not my home. We even put him in car take him riding & he then says " Take me home to 1442 Louis st why are you out riding around" . It is very frustrating as no answer satisfies him. This is from noon until about 5:00 p.m. then he go back to being him old self . What is going on ??