Lack Of Legacy
He knew that he must have been a medical miracle considering that he had three boys. He responded to the doctor by saying that he was mistaken because he did have children, three boys on the contrary.
Her Confession
He felt confident when he told the doctor that the diagnosis was wrong and he was sure that the doctor, a professional, probably felt a bit embarrassed for misdiagnosing him. There was no other explanation considering he had three children!