1. Extension/Enhancement: Every technology extends or amplifies some organ or faculty of the user. What does the medium enhance or intensify?      True , but this is about the tech more than a media artifact.
  2. Closure/Obsolescence: Because there is equilibrium in sensibility, when one area of experience is heightened or intensified, another is diminished or numbed. What is pushed aside or obsolesced by the new medium? true, but this is about the humans perception system , not the artifact of a medium. 
  3. Reversal: Every form, pushed to the limit of its potential, reverses its characteristics.  wtf? 
  4. Retrieval: The content of any medium is an older medium.  kinda obvious… but its focused on the artifact and not its affect in a shared reality.