dunce (n.)
To call someone a dunce is to call them slow to learn. The word comes from John Duns Scotus, a medieval philosopher admired for the subtlety of his thinking.1
Scotus studied and taught at major European universities. His lectures on Peter Lombard’s Sentences, a central work of medieval theology, became a widely read commentary. Glasgow University Library holds a printed edition from 1477, nearly 170 years after his death.2
His reputation changed as humanism gained ground in the sixteenth century. Followers who defended his teaching were ridiculed for resisting the new learning. Duns, a name associated with a school of thought, became a term of contempt. It acquired the spelling dunce and broadened into an insult for someone considered incapable of learning.12
He felt like a dunce when he finally understood the instructions.