"Grammars of action" and stone flaking design space / Mark W. Moore -- Insights on the technical competence of the early Oldowan / Ignacio de la Torre -- Growing up in the Middle Pleistocene : life history strategies and their relationship to Acheulian industries / April Nowell and Mark White -- How Levallois reduction is similar to, and not similar to, playing chess / Thomas Wynn and Frederick L. Coolidge -- On standardization in the Paleolithic : measures, causes, and interpretations of metric similarity in stone tools / Steven L. Kuhn -- Middle Stone Age tools from Klasies River main site and symbolic cognition / Sarah Wurz -- Possible relationshion between language and technology in human evolution / Dietrich Stout -- Stone tools and the evolution of hominin and human cognition / Iain Davidson -- Current developments in inferring cognitive capabilties from the archaeological traces left by stone tools : caught bwetween a rock and a hard inference / Philip J. Barnard.