Four engineers (one mechanical, one electrical and two software) are on their way to a meeting, part way there the car breaks down.
The mechanical engineer gets out and has a look under the bonnet (Hood for those in the USA).
He that declares, "nothing appears to be broken, and we have plenty of petrol" (Gas for those in the USA).
The electrical engineer gets out and has a look and declares, " the battery is charged, there are sparks at the plugs".
The software engineers get out and kick the tyres (Tires for those in the USA) and look mystified.
The all get back in the car and discuss what they should do next, call the breakdown service, get the bus, thumb a lift (Hitch a ride for those in the USA).
Eventually the software guys suggest, "Why don't we all get out and then get back in again and see if it will start!"
JimB