Terry Pratchett often subverts this trope by putting clever or profound statements in the mouths of Dumb Muscle characters, often with the smug addendum, "I may be slow, but I ain't stupid."
William de Worde: William de Worde. Ankh-Morpork Times.
Detritus: I don't read dat.
De Worde: We'll put out a large print edition.
Detritus: Ho, ho, dat very funny. But fick as I am, I'm still the one saying you can't go past.
- The elder brother and classmates of William de Worde, from the quote above, are likewise described as Dumb Muscle, albeit blue-blooded Dumb Muscle who'll actually be hiring lower-class Dumb Muscle to do the Dumb Muscle work for them someday.