Give them a spear?
LOL - they can design it themselves without any help from self-titled tinkerers.
sure. lets strip your EE of all his belongings, give him a loincloth like the people form that tribe are wearing and drop him in the jungle. let's see him make that spear ....
Sure he can make a spear, if he has access to hammers , saws, tape measures, nails, glue , a lathe , a drill, his computer ( gotta make a matlab model of the spear to check aerodynamics) and all his other stuff.
The tribespeople don't have any of that. they know where to find the right wood, how to prepare it , how to carve a silex stone into a spear tip , how to find a fibrous plant , peel thebark , make a rope out of it and tie the speartip to the stick...
by the time your gold-plated engineer has figured all that stuff out he will either be, or have:
- starved to death because it took him too long to find the source materials and make the parts to make the spear before he could go hunting
- stung or poisoned to death because he doesn't know what plants and or insects are around.
- eaten by some wild animal he is not familiar with.
- succumbed to some infection picked up in a cut he got by walking barefooted over the jungle floor and stepping on a sharp stick because his feet are used to soft socks and sneakers.
- be sacrificed to the local volcano god because he is white.
yet, the uneducated 6 year old kid of those 'wild men' has no problem making spears. not only can the kid make several spears a day, his aim throwing them is so good he can hit a monkey or bird in a tree 100 meters away , knows how to start a fire and how to prepare the animal for eating...
here is the awarding of the points :
uneducated bushman: 1
(dead) 'engineer': nil
so far for your 'engineer'