Looking over K.'s new introduction, S. notes that there is a much clearer thesis. She makes an appreciative comment in the margin. Although grammatical problems remain, she discovers in K.'s second paragraph a new, rather striking insight into the placement of the gene that controls finger dexterity. She realizes how the new thesis, inchoate in the first version, has led K. to this observation. "Excellent-- fine hypothesis," she notes in the margin. She is pleased as she reaches his fuller, more balanced conclusion. The new paper deserves a B+, a significant improvement over the original grade. S. realizes that reading this first paper has gone more quickly than she had anticipated; perhaps she will be able to read three of the papers tonight, leaving her more lab time in the morning.