Scoring Points
Your examiners aren’t making a tally of your contributions as you engage in the viva.
That response was a 5… I think we can give a bonus mark for that observation…
They don’t ask harder questions to give themselves a chance to mark you down either. They might make notes on what you say and how you say it but it’s not for points. The viva isn’t a great zero-sum discussion where only one side can “win”. The discussion is built together.
The viva is an exam but it’s not about scoring points.