Similar discussions going on in the cartography branch among UW Madison geography folks. Start with the post by Tim Wallace (where the above Venn came from). Then read the responses of Andy Woodruff and Daniel Huffman.
Art, science, and cartography
Graphical perception – learn the fundamentals first
Before you dive into the advanced stuff – like just about everything in your life – you have to learn the fundamentals before you know when you can break the rules.
Years You Have Left to Live, Probably
The individual data points of life are much less predictable than the average. Here’s a simulation that shows you how much time is left on the clock.