Mathematics Research Institute


Transport-based Counterfactual Explanations

Lucas de Lara (Institut de Mathématiques de Toulouse)

Fecha: 20/04/2021 11:30
Lugar: Seminario del IMUVa, Edificio LUCIA
Grupo: G.I.R. PEM

Counterfactual models aim at explaining machine learning predictions by answering questions of the form "had the input been different, would the output have been the same?" The literature mostly focused on two divergent frameworks to build these models: the neareast counterfactual instance principle –which is oblivious of the latent statistical distributions, and Pearl’s causal reasoning –which relies on a model unknown in practice. We extend a recent work that substituted causal interventions by a push-forward operator between probability distributions. We show that this approach leads to statistically consistent counterfactual explanations, free of prior assumptions on the data generation process.