What's the difference between fakes, forgeries and counterfeits in the worlds of European art, African drugs and Chinese painting production?

“The healer is a feeler” - a definition of an African tribal healer from this fascinating programme about the difference between these three words: fake, forgery and counterfeit.
     You will hear the authenticity of fetishes discussed from the moral, practical, aesthetic and commercial points of view in the same breath as art—including an account of a Chinese village where art students mass produce Van Goghs, before proceeding to Matisse, who is the second easiest artist to counterfeit, forge or fake—depending on your definition of the terms. Listen to The Forum. I would be surprised if you are disappointed.