I would like to share my experience before it gets lost in history...
In the winter of 1974/5, I attended a lecture at the AGO (Art Gallery of Ontario) by Stan Brakhage where he introduced and talked about his latest film "The Text of Light". I didn't enjoy the film but I could respect the artistic merit and being out of the mainstream, I recognized its' importance.
After the screening/lecture, the auditorium lights went on and I stood to put my coat on. I realized that professor Marshall McCluhan of the "The Medium is the Message" fame was seated in the next row immediately behind me. So I asked,'Dr. McCluhan, what did you think of the film?'
He paused for a moment and replied, "It was all light"
'I'm sorry Dr., did you say all light or all right?' He looked at me and just smiled as he put on his coat. I was speechless.
He was able to sum up the artistic and technical with a one liner.