premise: It took the sculptors Jean de Marville, Claus Sluter, and Claus de Werve 26 years (from 1385 to 1411) to complete the intricate marble and alabaster sculptures for the extravagant mausoleum of Philippe le Hardi.
hypothesis: Jean de Marville was not involved in the creation of the sculptures that were used in Phillipe de Hardi's mausoleum. 