title: Spring Security's "isAuthenticated()" expression really necessary when used with "hasRole()"?
body: <p>I need a clarification about <strong>Spring Security <code>isAuthenticated()</code></strong> built-in expression.</p>
  
  <p>See <a href="http://docs.spring.io/spring-security/site/docs/3.0.x/reference/el-access.html" rel="noreferrer">here</a> for documentation.</p>
  
  <p>I would like to know whether or not it is really necessary or plain redundant to use <code>isAuthenticated()</code> when the <code>hasRole()</code> expression is also used.</p>