This paper talks about the various ways CFT systems promote open rather than closed knowledge.
The citation is: Spiro, R. J., Collins, B. P., & Ramchandran, A. R. (2007). Modes of openness and flexibility in “Cognitive Flexibility Hypertext” learning environments. In B. Khan (Ed.), Flexible learning in an information society. (pp. 18-25). Hershey, PA: Information Science Publishing.