[BobS]

You are a materials scientist. You can re-create things used for survival a long time ago. My question is what were those tools made for to cut up? You won't find the answer.

Dump that search and get into aerospace. There are materials that need to be scoped out for real flaws created now.

[TXnMA]

"My question is what were those tools made for to cut up? You won't find the answer."

That is not the case. We experimental lithic technologists have reproduced blades like those shown, used them to cut both plant materials and meats -- and have then examined the microscopic edge wear (or "polish") with the SEM [Scanning Electron Microscope].

Our results match the wear on prehistoric samples very precisely. IOW, we can distinguish whether a prehistoric blade was used for cutting either vegetable material or meat. (FYI, plant cells contain minute particles of silica, [quartz sand] the difference between vegetable and meat wear/polish is dramatically obvious under sufficient magnification.)

FWIW, I am retired, and am doing what I enjoy now -- even if that entails "going back to the stone age" on occasion... '-)