Do you need special tools to do this though? Or just one rock that's harder than the other one? That said I used to make "tools" out of sticks and rocks as a c

Do you need special tools to do this though? Or just one rock that's harder than the other one? That said I used to make "tools" out of sticks and rocks as a child playing outdoors. Why do we think people didn't have tools or the capacity to invent them 12000 years ago?