Establishing a Functional use for the Middle Stone Age (MSA) Engraved Blombos Ochre Stone through Image-based Vectorization, Use-Wear Constraints, and Experimental Reconstruction Silvia Stein1, Morris Chukhman2 and Sergii Makhin3, 1 Cultural Heritage, 2 University of Illinois Chicago, USA 3 Cognitive Neuroscientist, Germany