Is this the same article that appeared in the Communications of the ACM? Not behind paywall, that&#x27;s a plus. (<a href="http:&#x2F;&#x2F;dl.acm.org&#x2F;citation.cfm?id=2699417&amp;CFID=612805967&amp;CFTOKEN=69304030" rel="nofollow">http:&#x2F;&#x2F;dl.acm.org&#x2F;citation.cfm?id=2699417&amp;CFID=612805967&amp;CFT...</a>)