title: Is a single string value considered valid JSON?
body: <p>Do you consider the JSON web response:</p>
  
  <pre><code>"A serialization error occurred"
  </code></pre>
  
  <p>to be valid or not?</p>
  
  <p><a href="http://www.freeformatter.com/json-validator.html" rel="noreferrer">Some validators accept it</a> while others don't.</p>