Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Kuhn's description of learning a paradigm in his 'Postscript -1969' (Structure of Scientific Revolutions 2nd edition 1970) was seized upon by Barnes as the best example of the social nature of scientific knowledge. How Kuhn could have written Structure without realising the social interpretation Barnes was to apply is difficult to understand when one re-reads Structure.