I get confused with font stacks that have sequences like:<p>Calibri, Candara, Segoe, "Segoe UI", etc. etc.<p>Are there systems that do not have Calibri but do have Candara or Segoe UI? (Excluding, of course, cases where some of these fonts have been installed manually and individually.) I would suppose not. If so, then what’s the point of specifying Candara, Segoe, and Segoe UI after Calibri?<p>Am I missing something?