Before revision: For example, since the publication of Éric Boëda's definition of six nondisassociable criteria for Discoidal debitage, numerous variants have been proposed, and many authors have argued for the presence of Levallois concept even when those six criteria were not met.
After revision: (that Eric defined from features of the Levallois Technique)For example, since the publication of Éric Boëda's definition of six nondisassociable criteria for Discoidal debitage, numerous variants have been proposed, and many authors have argued for the presence of Levallois concept even when those six criteria were not met.