Grandfather is having more. He was hospitalized with pneumonia also treated for UTI. Feeling a little better but wants to get ready for work he retired 30 years ago, thinks he's waiting for a jury at one point thought he was in jail and said he going to attempt a jail break. He also thinks im some lady that works at the hospital. So far relatively harmless but how should I respond. I tried reasoning with him but he gets agitated. Is this harmful if I let him think these things or change the subject?