1. A method of enhancing the reliability and accuracy of a computer generated expert database, said method comprising the steps of: a) first establishing a plurality of forward link associations between reference and related items having first respective weights; b) second establishing a plurality of back link associations between reference and related items having second respective weights, wherein said pluralities of forward and back link associations have a defined correspondence; and c) storing, to an expert database, data records identifying said forward link associations as association rules including said first and second respective weights.