Lets say YOU are a auto mechanic, a custmer does not want to bring in his car because you think he's a thief, He descibes a problem like this: The car started pulling to the left a little time ago, also I see a decrease in gas milage and it vibrates terribly over a certain speed, So with only that info You say: Sounds like there may be a wheel bearing or fron tend alighment problem, Now your custmer doesn't want to belive that so he asks about a dozen more mechanixs.... Well he comes back asking for more free advise but still not wanting to show you his car/truck. --- The problem has grown worse he explains. I've talk to everyone and tryed several adjustments and now not only do I have all the first problems but now it swerves in the lanes and is making a horrible noise. What could be wrong? You go into the could be the brakes speach. -----
After several more attepts to resolve this the custmer finaly brings the car in. After one quick walk around the car you explain to the custmer "Your front tire is flat."
Now it doesn't take a rocket scientest to figure out who the idiot is, We gave you the best info we could with the problem you described. So go pump up your tire and leave us alone