I don't really care if you assume the reviews are biased. I assume that all review websites have some number of fake reviews, and it's unlikely that exactly hal

I don't really care if you assume the reviews are biased. I assume that all review websites have some number of fake reviews, and it's unlikely that exactly half of the fake reviews are negative and the other half positive. Therefore all review websites would have some bias vs the ground truth sentiment. My only objection is to baseless accusations of malfeasance.