It has been seen that the range of subjects recognized by Protagoras and Prodicus gradually extended itself, until Hippias professed himself a teacher of all branches of learning, including in his list subjects taught by artists and professional men, but handling them from a popular or non-professional point of view.
Best execution is inappropriate as a concept other than for the smallest corporates and non professional individuals.
For a non-professional operator to offer a medical opinion on a radiogram is sheer impertinence " Arthur and Muir (1909) v-vi.