One would have to be a special kind of dunce to miss the context and message here.
The penalty for a miss is the same as in the sprint (dunce Lap).
Like the pursuit, there are four stops for shooting, but in lieu of a dunce Lap each miss adds a full minute to your total time.
"dullard," 1570s, from earlier Duns disciple "follower of John Duns Scotus" (c.1265-1308), Scottish scholar of philosophy and theology supposed to have been born at Duns in Berwickshire. By 16c., humanist reaction against medieval theology singled him out as the type of the hairsplitting scholastic. It became a general term of reproach applied to more conservative philosophical opponents by 1520s, later extended to any dull-witted student.