Sure and I guess Neanderthal tools would have produced similar tool shapes to those produced by historical humans. What this paper is saying is that S.Am. prim

Sure and I guess Neanderthal tools would have produced similar tool shapes to those produced by historical humans. What this paper is saying is that S.Am. primates may be responsible for primitive tools previously associated/attributed with/to humans (due to how they look/characteristics) in some South American sites but this aspect casts some doubt on the origin of those sites and thus affects chronological occupation of the continent by people.