title: How to OR and AND operator in CLIPS?
body: <p>I need to <code>OR</code> and <code>AND</code> operator while expression evaluation, but when I use it to <code>CLIPSDOS</code> it give wrong result.</p>
  
  <pre><code>CLIPS (6.31 6/12/19)
  CLIPS&gt; ( and 0 1 )
  TRUE
  CLIPS&gt;
  </code></pre>
  
  <p>I expect the output <code>FALSE</code> but it give <code>TRUE</code>
  What could be wrong?</p>