How to Disagree With Viva Examiner Criticism: Exact Scripts
How to disagree with a viva examiner politely and firmly: a four-step method, exact scripts for seven common situations, and when to hold your ground or concede.
Here is how to disagree with viva examiner criticism. Acknowledge the point, give your reason with a page number, admit the part that is fair, then say what you would change. That is what a scholarly disagreement sounds like. Edinburgh's viva guide puts it plainly: "If you come to a disagreement with your examiners, you should always try to explain why you disagree with them" (Edinburgh, A Guide for Viva Preparation).
Disagreeing is allowed. The same guide calls the viva "a critical discussion of your own work on which you are the expert". Trinity College Dublin's guide describes it as "a conversation between three experts in an area" (Trinity PhD Viva Guide). Below are a method, exact scripts and a test for when to hold your ground.
How to disagree with viva examiner points in four moves
Use four moves in this order: acknowledge, reason, concede, offer. The order matters, because it shows you heard the point before you answer it.
- Acknowledge. Repeat the examiner's point in one sentence, in their terms. "You are asking whether twelve interviews are enough to support the claim in chapter five."
- Reason. Give the reason for your choice and point to where it is in the thesis. "I set out why on page 84: the aim was depth on one process, not a claim about the population."
- Concede. Name the part of the criticism that is fair. "You are right that this limits how far the finding travels."
- Offer. Say what you would add or change, and how far. "I would be glad to make that limit explicit in the discussion section."
Edinburgh's guide warns against "Being defensive when criticized", and Trinity's warns against treating "perfectly reasonable questions as personalized attacks on your work". The four moves keep you clear of both. You are still disagreeing, but you are doing it with evidence. For how to shape any viva answer, not only a disagreement, see how to structure a viva answer.
Exact scripts for seven situations
Each script below is a model to adapt, not to memorise. The example thesis details are illustrations. Swap in your own pages, terms and reasons.
1. The examiner says your method was the wrong choice
"I can see why a survey would have given wider coverage. I chose interviews because my question was about how managers make the decision, not how many make it. The reasoning is on page 62. If you think the thesis would be stronger for it, I could add a short paragraph on what a survey would and would not have shown."
2. The examiner has misread what you wrote
"I may not have made this clear enough. On page 117, I meant that the effect appeared only in the second cohort, not in both. I can see how the sentence reads the other way, and I would be happy to reword it."
This script corrects the reading without saying "you are wrong". It takes some of the blame for the wording, which costs you nothing and keeps the discussion on the thesis.
3. The examiner prefers a different theory
"That framework would fit parts of the data. I used the one I did because it lets me separate the two kinds of trust in chapter three, which the alternative treats as one. I would be interested to hear where you think it fits better, because that could be a useful point for the limitations section."
4. The examiner asks why you left out a paper you excluded on purpose
"I did read that study. I left it out of the main review because it looks at a different population, as I explain on page 31. You may be right that readers will expect to see it, so I could add a sentence saying why it is outside the scope."
5. The examiner pushes back a second time
"I take the point, and I do not want to repeat myself. Let me try it another way. The claim I am making is narrower than it may sound: it is about this sample, in this setting. Would it help if I stated that limit more clearly where the claim first appears?"
When a disagreement goes round twice, narrow your claim instead of raising your voice. A narrower claim is easier to defend, and it gives the examiner something concrete to accept or reject.
6. You realise the examiner is right
"Thinking about it now, I agree with you. My original reasoning was (reason), but your point about (issue) is stronger. I would want to revise that section."
Changing your mind on one point is not losing the viva. Trinity's guide says examiners "will expect the student to be aware of" weaknesses and gaps in the work. Showing you can weigh a better argument is part of that.
7. You need a moment before you answer
"That is a fair challenge. Could I take a moment to look at what I wrote on that page?"
Trinity's guide says "There is no need to answer a question immediately". If you need the question put differently first, our guide on asking an examiner to rephrase a viva question has wording for that.
When to hold your ground and when to concede
Hold your ground when the criticism is about a choice you made on purpose and can justify from the thesis. Concede when the criticism points to something you cannot justify, or a reason you only thought of in the room.
| The criticism is about | What to do | First words to use |
|---|---|---|
| A choice you explained in the thesis | Hold, and point to the page | "I set out the reasoning on page..." |
| A choice you made but did not explain | Hold the choice, concede the gap in explanation | "I made that choice because... I can see it needs to be stated" |
| A factual or reading error by the examiner | Correct gently, take some blame for wording | "I may not have made this clear..." |
| An error you made | Concede and offer a fix | "You are right. I would correct that" |
| A matter of taste in the field | Hold, and acknowledge the alternative | "That is a reasonable approach. I chose this one because..." |
| Something you do not know | Say so | "I do not know, but I would look at..." |
Edinburgh's guide also says "Admit if you do not know the answer". For more on that last row, see how to answer viva questions you don't know.
Phrases to avoid, and what to say instead
Small word choices decide whether a disagreement sounds scholarly or defensive. Swap the left column for the right.
| Avoid | Say instead |
|---|---|
| "No, that's wrong." | "I see it differently, and here is why." |
| "As I already said..." | "Let me try it another way." |
| "My supervisor told me to do it this way." | "I chose this because..." (give your own reason) |
| "Everyone in my field does it like this." | "This is the approach used by (named author), because..." |
| "I'll change whatever you want." | "I would be glad to add... Would that address your concern?" |
The supervisor line is worth a special note. It moves the decision away from you, and the viva is your chance to show the decisions were yours.
When a disagreement turns into a correction
If an exchange ends with the examiner wanting a change, agree the size of it in the room. A vague "address this" can grow into rewriting that the examiner never meant.
"So that I get this right in the corrections, would one paragraph in the discussion section, stating this limit, cover your point? Or are you asking for more?"
If the two examiners want different changes, see what happens when examiners disagree in a viva. That guide has wording for asking them to agree which change they want.
If you think the disagreement was handled unfairly
Disagreeing with an examiner's academic view is different from being treated unfairly. Know what your university offers for the second case.
At Exeter, the lead internal examiner or the independent chair confirms before the end that the student is satisfied they were given a fair chance to defend the thesis (Exeter PGR Handbook, Chapter 12). At York, the department must make a recording of all research degree oral examinations (York Policy on Research Degrees, section 12). If you felt you were not allowed to finish answering, say so to the chair before the viva ends, and write it down the same day.
If you face a US dissertation defense
A US defense brings a committee and a process that runs from proposal to final revisions, so disagreements can come from several members at different stages. We cover that in how to disagree with your dissertation committee. Canada spells the event "defence".
What Thesisroom does with this
The best way to get these scripts into your own voice is to practise on the real passages an examiner might challenge. Thesisroom's Defense Practice writes questions an examiner could ask, each tied to a specific passage or page of your own thesis. You can answer in writing or out loud, in three styles: Practice, Rapid round and Mock panel.
Defense Practice does not write answers or scripts. The wording above is yours to adapt, and the reasons in each answer have to come from your own thesis.
Frequently asked questions
Is it okay to disagree with a viva examiner?
Yes. Edinburgh's viva guide says that if you disagree with your examiners, you should always try to explain why, and that disagreement does not mean an examiner thinks your research is below standard. Give a reason from the thesis, not just a "no".
How do you disagree politely in a viva?
Acknowledge the point in one sentence, give your reason with a page number, concede what is fair, then offer a specific change. For example: "I see why a survey would help. I chose interviews because... I could add a paragraph on that."
Should I just agree with everything the examiner says?
No. Agreeing to everything can leave you with corrections you do not believe in, and it hides your reasoning. Hold your ground on choices you can justify from the thesis, and concede on points you cannot.
What if the examiner keeps pushing after I answer?
Do not repeat the same answer louder. Narrow your claim: say what it covers and what it does not, and offer to state that limit in the thesis. "Let me try it another way" is a useful opening.
Can I say my supervisor told me to do it that way?
Avoid it. The viva tests your own reasoning, so give the reason for the choice in your own words. If the advice shaped the choice, explain the reasoning behind that advice rather than the fact that it was given.
What if I realise mid-viva that the examiner is right?
Say so. Trinity College Dublin's guide says examiners will expect you to be aware of weaknesses and gaps in your work. Name your original reasoning, accept the stronger point and say what you would revise.
Sources
- University of Edinburgh Doctoral College: A Guide for Viva Preparation
- Trinity College Dublin: Trinity PhD Viva Guide
- University of Exeter: PGR Handbook, Chapter 12, Examination of Postgraduate Research Programmes (2026/27)
- University of York: Policy on Research Degrees, section 12, Assessment
How this guide was made: Thesisroom drafted this guide with the help of AI writing tools, then checked every fact, figure and source by hand against the references linked above.