title: Scheme Error Object Is Not Applicable
body: <p>I am writing a Scheme function that detects if a word is in a list of words. My code uses an if statement and memq to return either #t or #f. However, something is causing the first parameter to return the error that the object is not applicable.</p>
  
  <pre><code>(define in?                                                                     
    (lambda (y xs)                                                                
      ((if (memq( y xs )) #t #f)))) 
  </code></pre>