concordion:assertTrue tag evaluates an expression
to obtain a boolean result. If the result is true, the tagged element
is marked as a success else it is marked as a failure.
Given this instrumented snippet:
<p> Since the password was correct, the user should then be <span concordion:assertTrue="#user.isLoggedIn()">logged in</span>. </p>
We get the following outcomes depending on the evaluation result of the expression