This is true. However, it's still not that difficult to grade for "well-done" work in subjective areas. Whether the thesis of a literary analysis paper is "co

This is true. However, it's still not that difficult to grade for "well-done" work in subjective areas. Whether the thesis of a literary analysis paper is "correct" may be opinion, for example, but it's definitely possible to grade fairly based on a rubric of "did the student defend their thesis in a clear, organized manner, properly using appropriate citations from the text" (after filtering out theses that are completely inane or insane).