Would a cached page in Drupal 7 be considered, solely by definition, RESTful?

Question

I'm thinking about how to explain the definition of a RESTful interface and am wondering if a cached page in Drupal would, purely by definition be considered RESTful: http://en.wikipedia.org/wiki/Representational_state_transfer#Constraints

Obviously if I wanted to setup a truly RESTful interface I would use Services or Fago's RestWS modules.

But by definition if the page is cached in D7 (thus there is no state information) is there a difference in definition between returning an xml or json endpoint and cached html page? Would the fact that there is javascript on the page create a state that would make it by definition not RESTful?

Again this is purely intellectual so thanks for any of your thoughts.