Are you really asking me for a history of discrimination in the US, including prohibitions against voting or owning land, the Separate Car Act leading to Plessy v. Ferguson and Jim Crow laws, the American Indian boarding schools, redlining, the Asiatic Barred Zone Act, and Japanese interment camps?<p>Perhaps &#x27;universal&#x27; isn&#x27;t the precise term, but I lack a more nuanced term, and it captures the idea that many more people don&#x27;t like Obama simply <i>because he is black</i> than those who don&#x27;t like him simply <i>because he is a man</i>.<p>The examples you gave are also less universal. I agree that single males in the US face discrimination for being at or near a playground or around children in general more than women do. But that is not as universal as non-whites forced to leave so-called &#x27;sundown towns&#x27; by sunset, or the &quot;Tacoma Method&quot; used to expel Chinese residents from cities in the west coast.<p>Going back to the OP, the recent prejudice against unaccompanied males near playgrounds is another example of how humans don&#x27;t really use a Bayesian analysis.