Pluralistic ignorance
Pluralistic ignorance can be contrasted with the false consensus effect. In pluralistic ignorance, people privately disdain but publicly support a norm (or a belief), while the false consensus effect causes people to wrongly assume that most people think like they do, while in reality most people do not think like they do (and express the disagreement openly). For instance, pluralistic ignorance may lead a student to drink alcohol excessively because she believes that everyone else does that, while in reality everyone else also wishes they could avoid binge drinking, but no one expresses that due to the fear of being ostracized. A false consensus for the same situation would mean that the student believes that most other people do not enjoy excessive drinking, while in fact most other people do enjoy that and openly express their opinion about it.
Cultural pluralism
Cultural pluralism is a term used when smaller groups within a larger society maintain their unique cultural identities, and their values and practices are accepted by the wider culture provided they are consistent with the laws and values of the wider society. As a sociological term, the definition and description of cultural pluralism has evolved over time. It has been described as not only a fact but a societal goal. Cultural pluralism is distinct from (though often confused with) multiculturalism. Multiculturalism lacks the requirement of a dominant culture. If the dominant culture is weakened, societies can easily pass from cultural pluralism into multiculturalism without any intentional steps being taken by that society. If communities function separately from each other, or compete with one another, they are not considered culturally pluralistic.