IFN: Open a book, close your eyes and point
I opened a book and I put my finger on the page without looking. Didn't quite follow the instructions - I never closed my eyes. However, my word was "degree". I happened to have this graphic hanging around, so here it is. Obviously, it's a bit out of date now - I believe there could be a few more gradations, but what can I say? I can't keep up.