Thanks, but I don't think that's exactly what it says. It says
"Most archaeologists assume that boiling in perishable containers cannot pre-date the appearance of fire-cracked rock (FCR)"
"This paper has two principal goals. The first is to alert archaeologists and others to the fact that one can easily and effectively boil in perishable containers made of bark, hide, leaves, even paper and plastic, placed directly on the fire and without using heated stones."
