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.
Pluralism (political philosophy)
As put by arch-pluralist Isaiah Berlin, "let us have the courage of our admitted ignorance, of our doubts and uncertainties. At least we can try to discover what others [...] require, by [...] making it possible for ourselves to know men as they truly are, by listening to them carefully and sympathetically, and understanding them and their lives and their needs... ." Pluralism thus tries to encourage members of society to accommodate their differences by avoiding extremism (adhering solely to one value, or at the very least refusing to recognize others as legitimate) and engaging in good faith dialogue. Pluralists also seek the construction or reform of social institutions in order to reflect and balance competing principles. One of the more famous arguments for institutional pluralism came from James Madison in "The Federalist" paper number 10. Madison feared that factionalism would lead to in-fighting in the new American republic and devotes this paper to questioning how best to avoid such an occurrence. He posits that to avoid factionalism, it is best to allow many competing factions (advocating different primary principles) to prevent any one from dominating the political system. This relies, to a degree, on a series of disturbances changing the influences of groups so as to avoid institutional dominance and ensure competition. Like Edmund Burke, this view concerns itself with balance, and subordinating any single abstract principle to a plurality or realistic harmony of interests.