@BillW,
Neolithic knapper (the k is silent). Archaeologists and hobbyiists still do flint knappling, to try to figure out how the ancients made stone tools. One archaeologist who needed open heart surgery insisted on making his own obsidian flaked tools for the operation, since obsidian tools have something very close to a monomolecular edge, which under high magnification makes a surgical scalpkel look like a mountain range, jaggedy/. This is true.[youtube]https://www.alamy.com/mesolithic-and-neolithic-flint-tools-image352798516.html[/youtube]
