Imagine, that someone is preparing for a PhD defense. The thesis that he is going to defend is by far against the norm. That is, it uncovers deep-seated beliefs that led to 30 years of malpractice. So he knew in advance that if he will not be well prepared for that this would label his thesis a heresy. Therefore, he did his best to analyze the data at hand very carefully, doing everything possible to validate the results and justify his approach why this method and not that sort of thing. He adopted a very hard and long path just to be well prepared for the day of defense. In addition, he knew in advance that the examiners will be not that easy to convince unless a really solid proof is presented before their eyes.
I want to describe the results of the PhD student using a catch-phrase:
One phrase came to my mind, but I am not sure how suitable it is here:
The results concluded form the analysis were irrefutable.
Please, can you help me with better phrases or iterations of the same theme, e.g., using the committee-[something], I heard of one phrase but I lost the site where I read it, it was like: jury-[something]. Now looking for it like searching for a straw in a haystack.