[goat granny]

*** idiot, moron and imbecile...***

I believe those were used to determine the degree of mental retardation in medical terms. Way back in time..

[csense]

You're right, I shouldn't have used the word “coined” for all three. I believe “moron” was coined in the early 1900’s by Goddard, but if I recall correctly, he was the one that first classified and quantified all three of them for the emerging field of clinical psychology during the eugenics movement.