Did Homo erectus Have Language? The Seafaring Inference

Various authors have claimed over the years that Homo erectus had language. Since there is no direct evidence about the matter, this claim represents the conclusion of a multi-step composite inference drawn from putative non-linguistic attributes of the species. Three maritime behaviours are central among these attributes: crossing open seas to get to insular islands such as Flores in the Indian ocean and Crete in the Mediterranean; building complex watercraft for the crossings; and undertaking navigation in making the crossings. Dubbing it the ‘Seafaring Inference’, the present article reconstructs and appraises the way in which Barham and Everett use the Seafaring Inference to build a case for the claim that Homo erectus had language. This composite inference starts from certain lithic objects found on Flores and ends, via six simple inferences, with the conclusion that Homo erectus had a form of language. The main finding of the article is that this composite inference is flawed in including a simple inference which is unsound and, accordingly, cannot be used to make a strong case for the claim that Homo erectus had language. There is a less well-developed variant of the Seafaring Inference which proceeds from the recovery of lithic objects on Crete. This variant is found to be multiply flawed, there being several simple unsound simple inferences among its components.