title: Nintex Forms 2010 - How to set a rule with multiple checkbox options
body: <p>I have a Nintex form and one field has 5 checkboxes where the user can make multiple selections:</p>
  
  <pre><code>Please select all that apply: [] red [] blue [] green [] yellow [] purple
  </code></pre>
  
  <p>If the user makes any selection that contains "purple" then i want another field to show asking for additional information. </p>
  
  <p>I currently have my question field in a panel and this is the current rule for that panel:</p>
  
  <pre><code>not(Colors == "purple")
  </code></pre>
  
  <p>Right now it works but only when "purple" is the only selection. I need a statement that says -- Only show if Colors[the checkbox field] equals any combination of choices containing purple. </p>
  
  <p>What's the correct syntax to use?</p>