Dude has Alzheimer's. I'm convinced now.
"Signs of Moderate Alzheimer’s Disease
In this stage, more intensive supervision and care become necessary, which can be difficult for many spouses and families. Symptoms may include:
Increased memory loss and confusion
Inability to learn new things
Difficulty with language and problems with reading, writing, and working with numbers
Difficulty organizing thoughts and thinking logically
Shortened attention span
Problems coping with new situations
Difficulty carrying out multistep tasks, such as getting dressed
Problems recognizing family and friends
Hallucinations, delusions, and paranoia
Impulsive behavior such as undressing at inappropriate times or places or using vulgar language
Inappropriate outbursts of anger
Restlessness, agitation, anxiety, tearfulness, wandering—especially in the late afternoon or evening
Repetitive statements or movement, occasional muscle twitches"