In nonmonotonic reasoning, the Nixon diamond is a scenario in which default assumptions lead to mutually inconsistent conclusions. The scenario is: usually, Quakers are pacifist usually, Republicans are not pacifist Richard Nixon is both a Quaker and a Republican Since Nixon is a Quaker, one could assume that he is a pacifist; since he is Republican, however, one could also assume he is not a pacifist.
In nonmonotonic reasoning, the Nixon diamond is a scenario in which default assumptions lead to mutually inconsistent conclusions. The scenario is: usually, Quakers are pacifist usually, Republicans are not pacifist Richard Nixon is both a Quaker and a Republican Since Nixon is a Quaker, one could assume that he is a pacifist; since he is Republican, however, one could also assume he is not a pacifist.
Source: Wikipedia "Nixon diamond" · CC BY-SA 4.0
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