Back when I was a uni student, it was not uncommon for law exams to be 'redeemable'. What this meant was that if you got a really shitty mark in your mid semester exam, you could opt to take a longer exam at the end of semester and if you attained a higher mark, you'd get to disregard your mid semester result. One of my law Professors would have none of that though. In response to a student question of whether the end of semester exam was redeemable, the professor simply answered back "Life is not redeemable". You make choices. Things happen. Live with the consequences. It was a valuable learning experience.