Four engineers were driving to a conference together when their car stopped dead in the road. The Electrical Engineer said it was clearly a wiring problem and they needed to check the fuses. The Chemical Engineer said obviously it was a clog in the fuel line - all they needed to do was clean the fuel filter. The Mechanical Engineer said that they were all mistaken - surely it had thrown a rod and they needed to rebuild the engine. They all waited for the Software Engineer to say something, as he just sat there. Finally they asked him what he thought was wrong. He shrugged his shoulders and said "I don't know maybe if we get out of the car and get back in it'll start."