[Marcella]

“Can you identify the rocks that will make a suitable cutting edge?”

Rocks that have a fracture point.

[JRandomFreeper]

I would expect you to know stuff like that. You aren't anybody's dummy. In fact, sometimes, you are sorta scary. ;)

How about this one. Given a green sapling, 1.5 inches in diameter, 5 ft long, your sharp rock and a fire... how do you make a hasty, field expedient spear out of it that will bring down a feral pig?

Assume we will give it to a brawny young man that isn't too bright and will poke a feral pig with a spear and maybe live through it.

/johnny