That's what I try to tell my students,.....when you make one simple writing mistake you might start the WW III with it....
Of course I wanted to type "severe" in the meaning of "to strict".......

But such things happen when your brain is faster than your old fingers.....
Mea culpa, mea culpa.......

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"Never Argue With An Idiot. They Will Drag You Down To Their Level, Then Beat You With Experience"