When. looking at a class or cluster, a central example is one that is far form the edges, so that small pertubations in the values in the example do not change the classification. For example, a blackbird is a central example of a bird, wereas a penguin (lfughtless swims a lot) owuld be a boundary example. Cenral exmaples can be useful in explainable AI when the rules for allocating classes have been generaed using machine learning.
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Identifying central and boundary examples