François Bordes on how to tell the difference between a Mousterian point and a convergent scraper:

The best way to decide is to haft the piece and try to kill a bear with it. If the result is successful, then it is a point; if not, then it should be considered a convergent scraper. One of the problems with this approach is that it can quickly exhaust the available supply of bears or typologists

– As paraphrased by André Debénath and Harold L. Dibble in Handbook of Paleolithic Typology: Lower and Middle Paleolithic of Europe (1994)