to differentiate as to the political leanings or beliefs of a source. As in all good data and information accumulation anything biased is eliminated.

Unfortunately the resource of most Americans these days is their political bent (that's fine as long they know it is biased) and the media which is not only biased, but frought with mis-information. As told to me by the publisher of a very noted newspaper and television stations...they are obligated to be first and if it is accurate or true....all the better. And of course no one accepts information from politians or politico inspired.

So in doing TRUE research be prepared to be enlightened and possibly disappointed.

BTK