"Jeremy clarkson could explain the workings of an engine"

Really? The physics of it, the chemistry, the role of each individual part? He could tell you how the engine management system works down to the reason for the existence of each part of a printed circuit, every component, the manufacturing process involved in each of those components? He can tell us all, in understandable terms why electrons flow through the circuits the way they do, how many of them there might be? He could explain how we see the visible light from the indicators? How that is generated? Who discovered the principles behind all of the countless applications and processes involved making something as irreducibly complex as a modern car?

You could, of course find all these things out, but not off Clarkson. He just drives cars, is a TV presenter and insults foreigners. You Pete, might say the car is evidence of god (if you choose to believe it is), but if you got off your arse and put the time in to find out you'd see people have discovered the scientific principles that make a car work and used that knowledge to manufacture it.

But you won't.