title: Excel - Count How Many Non-"Yes" or Non-"No" Answers
body: <p>Is it possible to use the <code>COUNTIF</code> function - or any other function - to find all values which <strong>aren't</strong> equal to "yes" or "no" values?</p>
  
  <p>I am able to use <code>COUNTIF</code> to locate all "yes" and "no" answers (also also all blank cells), but I want to extract the "dirty" data from some survey results and include it in the "Missing" total.</p>
  
  <p>I have tried to search for all values that are not equal to "yes" or "no" (by way of using the <code>NOT</code> function), but this failed to work.</p>
  
  <p>Can this be done?</p>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>Please note that I also suspect that <code>COUNTIFS</code> could do the trick, but am unsure exactly how to lay the function out.</p>