How would you be able to tell if it wasn't that some of the search results have such an obvious leaning that they would not be considered useful search results?

How would you be able to tell if it wasn't that some of the search results have such an obvious leaning that they would not be considered useful search results? Other than that there is also a chance that certain websites have a high hit rate because of the words used in the articles or the amount of articles put out. If certain publications clutter your results they are likely to get banned.