Worth linking "diverse double-compiling" there or to some other resource, if I may make the suggestion.
For other interested readers:
a) html version of David Wheeler's dissertation: http://www.dwheeler.com/trusting-trust/dissertation/html/whe.... I read it over a week last month, and it made a big impression on me.
b) the HN discussion for the Wheeler dissertation: https://news.ycombinator.com/item?id=12666923