There prejudgements were held with intentional neglect of evidence because their categorizations are so deep rooted. Undeniably our categorizations need constant review in order to create more positive and rational forms of identification. On a more positive viewpoint - since categorization simplifies our perception by allowing us to identify with something and therefore put it into a class, in a sense it also provides a certain amount of security. In fact in some cases if the right categorization is made lives can be saved. When we see these prior warning signs we are able to give the subject an identity.
Undoubtedly categorization has many more attributes.
Returning to the question of how we can ensure that our categorizations are valid, it is worth addressing the means by which we operate in order to reassure and justify our judgements. For example it is argued that the reassurance that a word has been identified correctly comes from the knowledge that it is in keeping with the context of what has passed before. The news combined with the people s beliefs led to a negative prejudgement. They were deceived. This generally works when the people accept official judgements, but of course problems are caused when there is disagreement with the methods of testing, which class something or someone in a certain category.