Note: Exempt the University of Pittsburg web site, in web browser extension "HTTPS Everywhere", to prevent redirection, from http://www.pitt.edu/~jdnorton/Goodies/Zurich_Notebook/, to https://www.pitt.edu/~jdnorton/Goodies/Zurich_Notebook. The latter seems to generate error "Page Not Found"...possibly due to mixed content http/https HTML (?) Browser: Google Chrome, 48.0.2564.109 m.

Fascinating look at failure, which I think is pretty common to math at this level. Yet in the end once he eliminated all the failure genius appeared.