1. A collaborative decision making system, comprising: a communication network; at least two user interfaces connected to said communication network; and a decision making process accessed by users via said user interfaces, said decision making process performed by an algorithm that operates to: identify a problem to be solved; identify a plurality of possible outcomes for said problem to be solved; structure said plurality of possible outcomes into a belief network; solicit evidence from said users relating to said outcomes; generate a probability table containing a conditional probability based on said evidence for each of the possible outcomes wherein beliefs in the confidence level of an outcome is obtained from each user and entered in said probability table; and apply a selective weighting factor to add or remove from consideration evidence based on a discrete user that submitted the evidence to adjust the conditional probability for each of the possible outcomes.