title: How can I find out if a user has clicked the Facebook Like button on my website?
body: <p>I want to include content on my website which will only be displayed if the user has clicked the Facebook Like button on the very same page. I see in the documentation there is the "edge.create" event which I can subscribe to but won't that only fire when the user likes the page the very first time? If a user has already liked the page, I want him to be able to come back and download again without having to unlike and then like again.</p>
  
  <p>I also notice that this information can be queried through FQL and the likes but it's not clear what the auth requirements are for this.</p>
  
  <p>Is it possible to do this in some way without extra authentication? I want there to only be a single step for the user if he is already logged in.</p>