 ግን በተለያየ ጊዜና ቦታ እንዲሁም ሁኔታ ውስጥ የተፈጸሙ የተለያዩ መሆናቸው እንጂ አንዱ ተአምር በተለያየ ቁጥር የተቀመጠ አይደለም።
However, there was a great deal of debate over whether the distinct types, which co-occurred in some sites and not in others, represented distinct temporal periods or distinct ethnic groups.