7. The method of claim 6 , wherein the first probability is calculated using a Bayesian probability function and the second probability is calculated using a Bayesian probability function.
7. The method of claim 6 , wherein the first probability is calculated using a Bayesian probability function and the second probability is calculated using a Bayesian probability function. 8. The method of claim 7 , wherein determining the topical proximity includes calculating the difference between the first probability and the second probability.