Given some samples of search results we still don't know: - The X matrix (e.g. the page rank score) for each result. - The y vector, i.e the score for each re

Given some samples of search results we still don't know: - The X matrix (e.g. the page rank score) for each result. - The y vector, i.e the score for each result. Although we can observe the relative ranking in each sample (would be interested to hear about techniques to cope with this).