Regarding [1], maybe we could do A/B testing to find out which results users find most useful ?
[1] https://en.wikipedia.org/w/index.php?search=the+night+is+nigh&title=Special:Search
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On the surface this sounds fine to do, but it really wouldn't work. The order of the sister project results that are returned are in no specific order (other than by recall) and we've got lots of evidence that most users only look at the first one or up to the first 3 results of any search results and click or view them...rarely do they go beyond that.