Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Yes, that's true. I think I have a feel for what's going on here — the failure is something to do with the 'spikiness' of intersections of balls — but I can't put a finger on a nicer way to express it than the original question. (I'm in the UK)
