Text: The oversight is not the result of an effort to avoid downbeat or offensive sides of Degas, but rather a failure to understand the seismic shift in French society caused by l'affaire . Photography and French nationalism were also linked in Degas' mind.
Entailment: Failure to understand the changes in French society is what caused the oversight for Degas.
Contradiction: Photography had nothing to do with French nationalism for Degas.