A study published this year gave 1,339 teachers the same piece of student work with a wrong grade already attached. When the grade was too harsh, teachers left it standing more often if the label said it came from AI.

It made me think about how often a number reaches us before our own judgment does.

Think of the last time someone else's grade was in front of you before you read the work, from a TA, a colleague or a tool. Did you change it, or did it stand? One line is plenty.