Assertion: flint's edge | /r/HasProperty | smooth
Facets:
value: for the best performance
type: PURPOSE
Source sentences:
text: Hand axes made with a soft hammer are usually more symmetrical and smooth, with rectilinear edges and shallow indentations that are broad and smooth so that it is difficult to distinguish where one flake starts and another ends.
text: For the best performance the edge of the steel should be smooth, as is the case with the back of a knife or a boy scout striker.