3. The system of claim 2 , wherein collecting a simple poll via an optional voting scheme indicates whether a user liked an explanation; wherein an encryption scheme hides a user's identity, and wherein it is guaranteed that a user votes only once.
3. The system of claim 2 , wherein collecting a simple poll via an optional voting scheme indicates whether a user liked an explanation; wherein an encryption scheme hides a user's identity, and wherein it is guaranteed that a user votes only once. 4. The system of claim 3 , wherein said simple poll comprises a voting scheme comprising a user operated forward and back selection mechanism.