It is something being worked on, though [0]. Extremely difficult does not equate to impossible :)<p>0: <a href="http:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;1504.03966" rel="nofollow">http:&#x2F;&#x2F;arxiv.org&#x2F;abs&#x2F;1504.03966</a>