#162 - 15 Rules of the PhD Viva

Today, I am going to tell you what I wish every candidate knew before they sat down across from me, because most of what you have been told about viva preparation is either vague or wrong.
19 August 2026
Read time: 3 minutes
The viva is not a test of whether you got everything right.
It is a test of whether you can defend what you chose.
That is a completely different thing, and understanding the difference will change how you prepare.
I have examined over forty-five theses and I can tell you that those who struggle are the ones who cannot explain why they did what they did.
Nobody teaches you how to handle that.
Your supervisor tells you to "prepare for the viva" and leaves you to guess what that actually means.
So here are the fifteen rules I have learned from the other side of the table.
#168 - What Examiners Read First: The 10-Minute Alignment Check
#167 - 2 Mistakes That Hide Your Contribution From Your Examiner, and the 1 Sentence That Fixes Them
#166 - Show Me This Gap: How to Show a Research Gap Instead of Claiming One
The Research Insider
What an examiner actually saw this week. A short letter from the other side of the viva table. I was a lost PhD student once, in my office at 2am, surrounded by papers nobody had taught me how to read. I got through it. Then I sat on the examiner's side of the table more than forty-five times, and learned the thing nobody had told me. Whether you pass comfortably rarely comes down to how good your research is. It comes down to whether your thesis shows the examiner what they're looking for, and most capable people were never shown that. That's all this letter does. Three weeks out of four it's short, about four hundred words. One real thing I read, details changed: a sentence that doesn't say what it thinks it says, a method that won't survive the first question, a passage where the writer's own voice has quietly disappeared. What I saw when I read it cold, the fix, and a test you can run on your own work tonight. That last one is newer, and it's where most of the worry is now. The question I get asked is whether a detection tool will flag them. The question that decides anything is whether an examiner will believe the thinking is theirs, and those aren't the same question. I train universities on this, and I've sat on the faculty side when a tool flagged an honest candidate, so I know how that conversation goes and what evidence actually helps. The fourth week is longer. Once a month I read every page people send me for Pass or Revise, my live session where three of them get read out loud. Then I write up what I found across the whole pile, including what it made me change in the way I teach. Free, and one ask a month at most. 45+ doctoral theses examined across 15+ universities. 25+ PhDs supervised to completion. 35+ working professionals mentored through a doctorate alongside a career. 240,000 researchers follow my work on LinkedIn. Free, and one ask a month at most.
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