 They found the Younger Dryas boundary layer 14C dataset to be inconsistent with the expectations for its synchroneity, and the synchronous global deposition of the hypothesized Younger Dryas boundary layer to be extremely unlikely.Proponents of the hypothesis have responded to defend their findings, disputing the accusation of irreproducibility or replicating their findings.Critics of the hypothesis have repeatedly addressed the responses, and have published counterarguments.