A biased viewpoint is a subjective opinion that is influenced by personal feelings or beliefs. It is often characterized by a 'SPIN' or 'SLANT' on the facts, which can be used to manipulate the audience's perception of the truth. The terms 'SPIN' and 'SLANT' are often used interchangeably to describe a biased viewpoint, with 'SPIN' referring to the intentional manipulation of facts to support a particular point of view, and 'SLANT' referring to the subtle alteration of facts to create a desired impression.