b)If we assume that fake reviews are a systematic source of error (i.e. all hotels have them) then you'd for instance remove one star from all ratings and still expect the same hotels to be on top. No doubt SasGuru can fill in the mathematical rigour (
)You have to read some reviews, not just look at the rating though... we'd do a search and then read the ones that look good, it's fairly clear when a review is NOT fake.





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