I suggest you ask your brothers and sisters how your school handles the examination papers, but I can tell you something about our school. 1 2 1 1 School, you have two chances to defend your thesis. If you fail in your first defense, you will have less than a week to rewrite your paper and then take part in your defense. The second defense is not as serious as the first one. Basically, you can pass the paper after revising it according to the teacher's first opinion. My feeling is that the school can't stop you from graduating from your thesis. After all, not graduating is not a good thing for the school. Take your department for example. The passing rate of graduation thesis is too low for teachers to hold on.