Engineers!

Engineers - they're my favourite people. If you ask me why, well, they have such a unique approach to life's problems. Normal, ordinary people would never even begin to think this way.

Three hungry cannibals --- who were a chemist, a physicist and an engineer --- found a human thigh bone.
The chemist licked it, and put it in water to try to dissolve it.
The physicist tried to break it open to get at the marrow.
The engineer took it, hit the other two over the head, and ate them.

See what I mean - simple, direct, practical and effective solutions. Just the kind of guy to have on your side in this big bad world!