Yes and yes. Felleisen: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=JBmIQIZPaHY" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=JBmIQIZPaHY</a>, Sussman: <a href="http:&#x2F;&#x2F;www.infoq.com&#x2F;presentations&#x2F;We-Really-Dont-Know-How-To-Compute" rel="nofollow">http:&#x2F;&#x2F;www.infoq.com&#x2F;presentations&#x2F;We-Really-Dont-Know-How-T...</a>