I had a friend who had a problem with his dad. It took some time to realize there was a problem
Sometimes his dad would drive to town to the bank. He would apparently become disorientated and would go to an insurance agency several blocks from the bank. He would ask for his agent that was no longer there. They saw that he got home.
After the second or third time his driving priviledge was curtailed.
It was sad because the man was healthy and still played golf