Sanity is the " baseline" of "mental health" that is established by means of observing the majority of people's pattern of thinking,priorities, perspectives, et cetera; such that people that deviate from the norm can be labelled as defective or can be repudiated and their existence denied by the majority of the population when " fun" can be made of someone else's existence or it is convenient to do so. For example when a person-let's call them A- uses a negative stereotype against someone else-B-, they may try to get out of the ethical implications by viewing those of a group that do not follow the negative stereotype as being nonexistent or defective even when simple deduction, reasoning, empathy,or understanding would have rendered the stereotype unethical and false as a sweeping all encompassing generalisation of a large group of people; in other words so that some one can be stigmatised