Might be kind of hard to "destigmatize" the underlying concept behind the various ways of saying someone isn't very smart. The general tendency of most people

Might be kind of hard to "destigmatize" the underlying concept behind the various ways of saying someone isn't very smart. The general tendency of most people to favor the in-group probably also provides enough of an underlying reality to make it hard to "destigmatize" the various ways of calling someone part of the out-group.