“…A link can be established between a weapon system and a fracture signal only on the condition that the effects of other, more influential, parameters are controlled for. Previous works and our projectile experiments 84 , 131 , 132 could establish that the parameters are, in order of importance, armature morphology, lithic raw material, hafting system, and weapon delivery system (Text S3). Because of this, the RIS analysis was carried out on a sample that was homogeneous in armature morphology and raw material (the tanged points).…”