In conversation, we might define a particular group by the characteristics that the majority of that group holds even if a minority in that group doesnt possess those characteristics.  Some possible examples:Human being eats meats (even though ~3-5% of human are total vegetarians)Russians like vodka (many dont drink there)Asians are brown (though there are many who are white)(Ignore the figures or classification its just for explaining purpose)The point is, why are we programmed to make generalizations this way, i.e., disregard the small or even significant but minority of a group while taking it as a whole, this is understood by common sense, but, I was wondering is there a scientific basis for this, perhaps some kind of theory presented by someone or a research that established this rule?
Ignoring minority while generalizing about a group, any theoretical reference?
social psychology;political psychology