I came across this due to a search-engine suggestion when searching for a certain xkcd comic [1].  Previous discussion here: <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=6822005" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=6822005</a><p>[1] <a href="http:&#x2F;&#x2F;www.xkcd.com&#x2F;225&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.xkcd.com&#x2F;225&#x2F;</a>