As we have noted, document pairs that contain lots of plausible transliteration pairs should be viewed as more plausible document pairs; at the same time, in such a situation we should also trust the putative transliteration pairs more.
these document pairs and transliteration pairs mutually "reinforce" each other, and this can be exploited to further optimize our transliteration scores by allowing transliteration pairs to propagate their scores to each other according to their co-occurrence strengths.