My declaration of the difficulty of the solution to a challenge posed by Eleanor was premature. The problem was difficult, but apparently not impossible to solve. I wrote the previous post before Francine found a solution using classic berrypicking techniques, further confirming the utility of using more search engines than just Google to increase the diversity of results. Of course now that she has linked to that page (particularly in such a prominent blog :-) ) Google may promote it in its ranking and make that result more findable. (I am not sure about the no-follow restriction on comment links, but none the less the likelihood of someone else linking or bookmarking that page has just increased.) Francine’s discovery through exploratory search thereby increases the odds that others will now find that document through Social Search.