How does a Twitter discussion compare to a BlackBoard Discussion? To an in-class discussion?

A Twitter discussion is pretty different than a Blackboard discussion and i believe for the main reason that you are limited in how long a tweet can be. Sometimes discussions can be very important and in order to bring your point across it may take over 140 characters, and this essentially limits your discussion tremendously. In a blackboard discussion there are no limits on how long it has to be and this may give more clear discussions. An class discussion which is face to face is the most powerful way to have a discussion because it is a personal interaction with clear emotions. The issue with typing is you may misjudge the emotions in which is being presented and that for sure alters how powerful the discussion can be.