From an independent source: A professional is someone who has completed formal education and training in one or more profession. The term also describes the standards of education and training that prepare members of the profession with the particular knowledge and skills necessary to perform the role of that profession. In addition, most professionals are subject to strict codes of conduct enshrining rigorous ethical and moral obligations. Professional standards of practice and ethics for a particular field are typically agreed upon and maintained through widely recognized professional associations.

I never once saw the term "leverage" or "fear" in that definition. We obvio isla have a difference of opinion. Good luck with your method.