You might be.
Certain, no doubts, no wavering.
Or your examiner might be.
100%, thought about it, no alternatives.
When someone is convinced, the best thing you can do is ask why. Once you know the why, you know what you need to think about.
If you’re convinced of something, ask yourself why. Arrange your reasons, be sure they are correct and your thinking is sound.
If your examiner is convinced of their opinion, and thinks differently to you, ask them why. Listen to them generously, be sure you understand what they’re saying, then explore how your differing convictions meet.
One of you might be wrong.
Maybe both of you are wrong.
You won’t know until you ask.