Four Israeli soldiers who all happened to be different types of engineers were riding in their Jeep doing a patrol. There was a mechanical engineer, a chemical engineer, an electrical engineer and a computer engineer.
Suddenly, their Jeep broke down.
The mechanical engineer said: "Sounds to me like the pistons have seized. We'll have to strip down the engine before we can get the car working again."
The chemical engineer begged to differ. "It sounds to me as if the fuel might be contaminated. I think we should clear out the fuel system."
"Well, I think it might be a grounding problem," said the electrical engineer, or maybe a faulty plug lead."
Having offered their opinions, the three turned to the computer engineer who was strangely silent on the matter. "What do you think?" they asked.
"Hmmm," said the computer engineer. "Perhaps we should all get out of the Jeep and get back in again?"