(naive idea!) Do Wikis have a fixed-point?! I guess depending on the content and the diversity of commonsense in that subject, they may have a vast range of dynamical behaviors, e.g. stable to a fixed-point (i.e. everyone agrees), limit-cycle (i.e. two diffent controversial belief about the subject), or even richer behaviors such as time-varying limit-cycle (i.e. dialectic dialog), or chaotic.
It is an interesting subject to work on. If you have any idea, please share it. If I find some interesting work, I will give a link to them.
No idea?!