A model of information filtration by comparison of randomly chosen   sources
  We study a simple model of the stochastic information filtering, in a randomly organized information system. For simplest versions of the model it appears to be possible to describe the filtering dynamics in terms of the master equations. Exact analytical results for these equations and results of numerical investigation of the dynamical features of the filter are presented. 
I.S. Manida, Yu.M. Pis'mak