<?xml version="1.0"?>
<oembed><version>1.0</version><provider_name>Uitgeverij Van Oorschot</provider_name><provider_url>https://www.vanoorschot.nl/en/</provider_url><author_name>Menno Hartman</author_name><author_url>https://www.vanoorschot.nl/en/author/menno/</author_url><title>The Unknown Unknown &#xB7; Uitgeverij Van Oorschot</title><type>rich</type><width>600</width><height>338</height><html>&lt;blockquote class="wp-embedded-content" data-secret="BmaVMBs7QN"&gt;&lt;a href="https://www.vanoorschot.nl/en/tirade_blog/the-unknown-unknown/"&gt;The Unknown Unknown&lt;/a&gt;&lt;/blockquote&gt;&lt;iframe sandbox="allow-scripts" security="restricted" src="https://www.vanoorschot.nl/en/tirade_blog/the-unknown-unknown/embed/#?secret=BmaVMBs7QN" width="600" height="338" title="&#x201C;The Unknown Unknown&#x201D; &#x2014; Uitgeverij Van Oorschot" data-secret="BmaVMBs7QN" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"&gt;&lt;/iframe&gt;&lt;script type="text/javascript"&gt;
/* &lt;![CDATA[ */
/*! This file is auto-generated */
!function(d,l){"use strict";l.querySelector&amp;&amp;d.addEventListener&amp;&amp;"undefined"!=typeof URL&amp;&amp;(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&amp;&amp;!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i&lt;o.length;i++)o[i].style.display="none";for(i=0;i&lt;a.length;i++)s=a[i],e.source===s.contentWindow&amp;&amp;(s.removeAttribute("style"),"height"===t.message?(1e3&lt;(r=parseInt(t.value,10))?r=1e3:~~r&lt;200&amp;&amp;(r=200),s.height=r):"link"===t.message&amp;&amp;(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&amp;&amp;n.host===r.host&amp;&amp;l.activeElement===s&amp;&amp;(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r&lt;s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document);
//# sourceURL=https://www.vanoorschot.nl/wp-includes/js/wp-embed.min.js
/* ]]&gt; */
&lt;/script&gt;
</html><description>Het was een boekhandelaar die het in mijn handen drukte.&#xA0;The Unknown Unknown. Bookshops and the Delight of Not Getting What You Wanted van Mark Forsyth. Een niet zo best geschreven traktaatje dat bovendien het heldendom van het gereleveerde inzicht in de richting van de hier toch onverwachte Donald Rumsfeld schuift. De centrale gedachte is dat...</description><thumbnail_url>https://www.vanoorschot.nl/wp-content/uploads/2014/09/WEBOK-1-Pirandello-Luig-1.jpg</thumbnail_url><thumbnail_width>527</thumbnail_width><thumbnail_height>620</thumbnail_height></oembed>

<!--
Performance optimized by W3 Total Cache. Learn more: https://www.boldgrid.com/w3-total-cache/

Page Caching using Disk: Enhanced (Requested URI contains query) 
Database Caching 120/135 queries in 0.070 seconds using Disk

Served from: www.vanoorschot.nl @ 2026-04-17 11:49:16 by W3 Total Cache
-->