When students write about virtue in the Nicomachean Ethics, the doctrine of the mean shows up in nearly every paper. It is also the idea most likely to be flattened into a slogan about balance or moderation. Graders who read dozens of these essays in a row quickly learn that a polished sentence about avoiding extremes often hides a serious misunderstanding of what Aristotle actually claims about character and choice.

The most common error is treating the mean as an arithmetic midpoint. A student might write that courage is halfway between cowardice and recklessness, as if a brave person were someone who is moderately afraid. Aristotle describes the mean as relative to us and determined by reason, which means the right response depends on the person, the situation, and the stakes involved.

A second frequent problem is confusing the mean with a call for mediocrity or compromise. Students sometimes argue that Aristotle recommends doing a little of everything, or that he would discourage intense commitment to anything. The text says plainly that in terms of excellence the mean is an extreme, and a paper that misses this point has not engaged with the actual argument.

What a Strong Paper on the Mean Actually Does

A strong essay chooses a specific virtue and walks through how the mean works for it, rather than listing every virtue in the table of examples. It explains the role of feelings and actions, notes that some actions such as murder have no mean at all, and ties the discussion to practical wisdom as the capacity that finds the mean in a given case. That kind of precision shows the student has moved past memorized terminology.

• Defines the mean as relative to the agent and situation, not as a numerical midpoint
• Distinguishes the deficiency and excess for one named virtue with a concrete scenario
• Explains why some actions and feelings admit no mean
• Connects the mean to practical wisdom and the role of right reason
• Cites the passage supporting each claim rather than relying on general memory

Writing Feedback That Corrects Without Discouraging

Students writing about Aristotle for the first time are often proud of having understood a hard text at all, so blunt corrections can land harder than intended. A better approach acknowledges the part of the reading that was accurate and then names the specific refinement needed. For example, "You have the idea that virtue involves balance, but check how Aristotle describes the mean for a person who faces a very large danger" invites revision instead of defensiveness.

It also helps to ask a question rather than only issue a correction. Prompting a student to explain how a generous person decides the right amount to give, and why that amount might differ for a wealthy donor and a struggling one, pushes them to apply the doctrine instead of reciting it. Questions like these tend to produce stronger second drafts than statements of what went wrong.

Scoring Fairly When Students Disagree With Aristotle

Some of the best papers argue that the doctrine of the mean fails, perhaps because it gives little guidance without already knowing what the wise person would do. A rubric that rewards agreement with the text will punish exactly the students who are thinking most independently. Grade the quality of the interpretation and the objection, not whether the student ends up sympathetic to Aristotle.

To keep scoring consistent across sections, many instructors define in advance what counts as a strong objection, such as one that identifies a real tension in the text and responds to the reply Aristotle might give. Tools like GraideMind can apply those criteria to each submission and flag essays where the evaluation is missing entirely. The instructor can then focus attention on the papers where interpretation and critique genuinely compete.

Building a Reusable Comment Set for the Mean

Because the same misconceptions appear year after year, it is worth building a short bank of comments tied to the most common errors. One comment might address the midpoint misreading, another the confusion between the mean and compromise, and another the failure to explain how practical wisdom is involved. Each should include the passage reference and a revision prompt so students know what to do next.

Revisiting the comment bank after each term keeps it honest. If a new misreading keeps appearing, add it; if an old comment never seems to help, rewrite it. Over several semesters this turns grading from a repeated chore into a body of teaching knowledge that new teaching assistants can learn from quickly.