title: Web-page with the same URL, but different parameters still counted the same to a previous?
body: <p>For <strong>static</strong> sites we can have a "page.html". This page do not have any parameters such as "?param=value.</p>
  
  <p>And it will be indexed by search engines and other things. No problems here.</p>
  
  <p>But I would like to know what actually happens with indexation when a single page, for instance "lessons.php?lessonID=1" has some parameters and its content is really different in contrast with page "lessons.php?lessonID=2".</p>
  
  <p>Are they indexed as two different pages?
  Are they at least condsidered being two different pages from a "machine" view?</p>
  
  <p>(P.S: I am asking because I am going to install disqus comments sistem on such a page and I don't know will the comments be different deneping on different page parameters such as lessonID).</p>