Was reminded of this during a #Microsoft event this morning. Still great.
I would love a confirmation on the author (I found only half the image on the website you linked to - did he add to it, did someone else?).
I teach students how to research (and why they should) and this is perfect for the course.
But since I ask them to always check and mention the source....
(and image search gives no definitive answer on the author and multiple versions for the second half)