Passage: The origin of the Dreyfus Affair, although fully clarified since the 1960s, has aroused much controversy for nearly a century. The intentions remain unclear. Many of the most eminent historians express different hypotheses about the affair but all arrive at the same conclusion: Dreyfus was innocent of any crime or offence.

Question: Contention has been present for almost 100 years due to what?
Dreyfus Affair