human
We chip axes by striking, he then said to the young ax maker.
gpt
That way of chipping is good enough for axes; they are heavy and have, besides, the weight of the arm to carry the blow. With spear heads it is different; a spear is thrown, and the head should be sharp. I can get a smaller chip, and so a sharper edge, by pressing than by striking; so I chip my spear heads by pressure.