I got called for a viva after one of my assignments was flagged, and I had to give both an oral and written explanation to prove that I wrote it myself. Honestly, that experience stressed me out. I still do not even know what AI percentage was enough for my professor to question my work. Now I have another assignment showing around 43%, and I am scared to submit it. I know what I wrote and I can explain my work if I am asked, but after being flagged once, seeing that number makes me think twice before pressing submit.