Problems

Some problems are easy.  Some problems are hard until they explode in great white balls of heat.  Still other problems fight for what seems like ages, but one day they lie down and let you solve them.

Eventually, there's the antelope collapsed on the ground, and there's your spear pressed against its neck, but by this point the antelope has been your adversary for so long he seems more like an old friend.  Gotta eat.