 ...C To continue Buhr's analogy, let's suppose that our automotive user  F suffers a true disaster: he gets what he asks for.  We join him as he  enters his car...   E When I entered the car, I was surprised to see only one light on the  F dashboard.  When I looked in the owners manual, I found that whenever E anything went wrong, the light came on, displaying a question mark.   F "The experienced driver," the manual said, " will usually know what's  wrong."   D I continue reading the manual.  In the section on the transmission, G there was a list of known problems.  The list contained a single item:  G "Behaves strangely on nights with full moons." (Actually, I was rather  G proud of having puzzled out that I was reading about the transmission,  9 because it was always referred to as "xn" in the manual.)   G Further on, I read "This brash sequence of actions attempts to get the  @ car onto the left-hand lane of a one-way street," followed by a - mixture of Labanotation and one-letter flags.   A Later that week, I tried a left turn.  I found out that one does  F different things to turn left in each gear.  Unfortunately, the index A only had an entry for left turns in second gear.  The shade-tree  D mechanic down the street saved my life by telling me that that page G actually had a description of how to turn left in all gears; they just  $ hadn't bothered to update the index.  B Before changing the oil, I read "... an addled dipstick should be A treated gently.  Experience and informed courage count for much."  D Eventually I got to a point at which I couldn't figure out from the B manual what to do.  The shade-tree mechanic down the street said, G "Shoot, you don't need the manual.  You can always take your car apart  E to find out what you want to know."  Unfortunately, the dealer could  C only give me the low price I got because I bought the car with the   insides sealed up.  @ A few days later I found out that an error in opening the glove ' compartment disintegrates its contents.    I now own a bicycle.