Right. I don't know how you would write a reasonable procedural generator in the first place without that kind of sanity check. With that heuristic in place yo

Right. I don't know how you would write a reasonable procedural generator in the first place without that kind of sanity check. With that heuristic in place you just generate mostly random stuff and throw out what doesn't work. Writing a generator that works about 99.9% of the time must require painful tweaking.