I am a physician who had recently met the daughter of a patient. The patient 's daughter ( not a medical person) did not think that my staff and I were doing everything possible to help her father. I had previously dealt only with the patient and his wife regarding treatment issues. The daughter came in at the next appointment and stated in my office hallway ( in earshot of patients and staff) that I was a "quack". I am board certified in my specialty, have a valid license in my state, and have a clean record with my state medical board. The daughter has insisted that my patient find another doctor although I have been with him for a number of years. I harbor no ill feelings toward the patient or his wife for the daughter's actions. Do I have a valid claim for defamation of character?