Contrastive Explanation Method (CEM)

Dhurandhar et al. support a type of contrastive explanation based on what they call pertinent negatives. A contrastive explanation answers the question: “Why P, rather than Q”?

CEM supports such an explanation by finding the minimal set of features that lead to prediction P (a pertinent positive that resembles an anchor explanation), and additionally a minimal set of features that should be absent to maintain decision P instead of the decision for closest class Q (a pertinent negative that is somewhat similar to a counterfactual ).

CEM is also implemented in the more encompassing Alibi .