fojo
jon orwant's blog
Mathematics
Tukey's tally [gnat]:
Imagine you're at a blackboard, counting votes in a meeting. You
probably count in groups of five, making four vertical lines and then
"finishing" the group by drawing a diagonal line through them.
Instead. you should count in groups of ten, by first marking four dots
to make the corners of a box, and then connecting each pair of dots.
Collection of Dijkstra's tech notes and trip reports, all handwritten