If you look at the video some of the patterns are very regular and geometric, not what I'd expect for a regular sharpening of a tool. It's possible they sharpen

If you look at the video some of the patterns are very regular and geometric, not what I'd expect for a regular sharpening of a tool. It's possible they sharpened tools artfully but then that's just a different way of creating the inscriptions. https://youtu.be/fFbgQhY4Yxw?t=769 https://youtu.be/fFbgQhY4Yxw?t=769