title: How to unshadow symbol in a Common Lisp
body: <p>I've shadowed 'and symbol doing some experiments:</p>
  
  <pre><code>MATCHERS&gt; (package-shadowing-symbols *package*)
  (AND)
  </code></pre>
  
  <p>Neither <code>(setf (package-shadowing-symbols *package*) nil)</code> nor Slime don't work.</p>