There was no scoffing, only mild amusement. Just keep in mind, by defending this examination of artifacts as analysis of a Neolithic stage, like some long isolated tribe of Borneo, you have effectively dismissed the true advance of civilization for the region by some four millennia. The early passing for central America, Mexico, was 6000 BCE which they came upon independently or in some cases prior to the fertile crescent or more advanced tool adopters. The laggards went through more around 2000BCE for the western hemisphere. But hey, what ever earns you grant money, construction delay, historical designation brownie points, knock yourself out.