This describes Biden to a T.
Dementia
Requires a medical diagnosis
Symptoms include forgetfulness, limited social skills, and thinking abilities so impaired that it interferes with daily functioning.
People may experience:
Cognitive: mental decline, confusion in the evening hours, disorientation, inability to speak or understand language, making things up, mental confusion, or inability to recognize common things
Behavioral: irritability, personality changes, restlessness, lack of restraint, or wandering and getting lost
Mood: anxiety, loneliness, mood swings, or nervousness
Psychological: depression, hallucination, or paranoia
Muscular: inability to combine muscle movements or unsteady walking
Also common: memory loss, falling, jumbled speech, or sleep disorder