To quote from his posting:
"Have I inherited a disaster? I hate taking over someone's bad code. The projects always go on forever and you are forced to follow bad practices to try and string together fixes and features without it all crumbling down. There are some quick, not always 100% accurate, ways to know whether you've inherited a disaster"It's an excellent read, and a good aide-memoire because it brings such a quick way to check for best (or worst) practice.
You can find the posting here.