How Aboriginies invented the idea of Contemporary art.

Today I found a really good book by Ian Mclean, the UWA Proffessor of Aboriginal Art and History. This book inlcudes many expcepts about their opinions about Indigenous Art in Australia written by Indigenous and non-Indigenous people.
One article I was intruiged by was called "Aboriginal Acrylics are the fictional voice of white history" by Nicholas Baume.
This article is basically saying how Aboriginal Art cannot be authentic if they are not created with traditional medium or symbols. Therefore is Tracy Moffat an Aborigianl artist? She uses a camera and hides Indigenous symbols in her work? Is Emily Kame Kyngwarreye an Aboriginal Artist? She doesn't use tradtional mediums like ochres in her work, she uses acrylics.

Another article that drew to my attention was called "Becoming an Aborigianal Artist"by Lin Onus. This article addresses the issues with tryin to bridge the gap between Urban and traditional Artists. Onus states that "Although the artists materials may change, the images and stories will remain stronge and everlasting".