How old is too old? An article in Time Magazine states: “At some point, and statistically it’s in the 80’s, you begin a more rapid decline.”

Physically and mentally, we pose questions about the current president’s fitness and there are questions about the previous one as well. Ronald Reagan had issues near the end of his administration at age 78.

A cognitive assessment test is available from Medicare and is part of a routine doctor’s visit through direct observation or by considering information from the patient, family, friends, caregivers and others.

According to the Mayo Clinic, there is no...