Edward Tufte is a famous author of visualization books series. He also teaches a well-known one-day class on visualization, which I took back in 2007 when he was in DC. I enjoy his books and still have them on my shelf. He knows a lot and is right about many concepts in information visualization: Sparklines, for example.

A snippet from Tufte’s book “Beautiful Evidence” discussing Sparklines

However, one controversy in his teachings is the case against PowerPoint. He once wrote a pamphlet…