Yeeeep, they lost me at the start of .... Well, the electrical bit. I'm still on "electricity flows, like water" 
Sort of, consider the flow as the current, the difference between the top and bottom of the pipe as the voltage (potential difference) and the bore of the pipe (e.g. the resistance to flow) as resistance
At the end of a long shift, if I'm seen standing with an empty water cup at an electrical socket, in stead of the water butt, I'm blaming you. 
It's no good Mark, I'm fine with stuff I can physically see. Geometry is fine for instance. Push rods and cams etc. I can see obvious faults with wiring as their visible, but component failure, if all looks normal or measuring stuff with a meter. No good.
Probably doesn't help that I have no need for electrical knowledge professionally either.
Telling me doesn't work either. (You may of noticed
) I have to physically do stuff to absorb it. Not sure what learning style that is but it's probably not common to most, I guess. 
http://en.wikipedia.org/wiki/Empirical_evidence 
Ah, indeed, practical types, as I referred to elsewhere.
As opposed to taking random bollards off the internet and re presenting as hard unequivocal indesputanle facts. Or impractical types.
Practical and impractical being far too small a pigeon hole, clearly.
See, some might say I haven't had an education. While I was over the fields on me bike, some might say I had an even better education, with practical hands on "Emperical evidence" encountered first hand.
To then be judged on the grounds of an education and qualification system that is based on all else except(by employers and managers mostly) really does grate my nerves, frankly.
...or maybe I need to accept other learning styles as genuine. (Snigger)