Second Thoughts
They’re probably better than your first thoughts at the viva.
First thoughts might come from nerves, worry, mishearing a word, wanting to get a point across or wanting to move past a question as quickly as possible.
Second thoughts are definitely considered. They might be the same as first thoughts but they might have more nuance or be better expressed. They’ll slow the pace a little and show your thinking.
Think, then think again. Take your time to give the best responses you can at your viva.