As a complete non-engineer who occasionally lurks here out of interest, may I stick in my two-pennorth (and probably get flamed!

)
AshEng and
Eng123 , I think you're misunderstanding
Genghis ' argument. He EMPHASISED that engineers doing your kind of job have to prove their worth. What he complained about was that engineers doing his job didn't...and therefore might be no good at it. Why on earth do you have a problem with that?
I know zilch about engineering...but I do know about people. Could it conceivably be the case that you have chips on your shoulders because you don't have degrees? Could it be that you don't like Genghis mentioning his qualifications without continually apologising for doing so...terribly un-English that, isn't it? Could you maybe have reacted to the person rather than the discussion as a result of the above?
I'm merely asking, that's all. After all, as a non-engineer, what do I know?
And my humble apologies for taking up your bandwidth, and even for being in here, oh great engineers.