Graduation thesis checks the repetition ratio of your thesis and other papers in the database, and usually does not check the authenticity of the data.
Even for external audits, the probability of being found to be fraudulent is not great, because the research papers in each field are very different, and it is difficult for reviewers to verify the authenticity of the data one by one. But it is best not to do this, because it will be suspected of academic misconduct, and the consequences will still be very serious.
The research data obtained on the basis of fraud, no matter how reasonable and meticulous, will inevitably be found.
Of course, this level of academic misconduct is very difficult to detect. Even if discovered, Schon claimed that he miscalculated and could get away with it. It is difficult for the outside world to conclude that he has a serious subjective fabrication. But since then, these bad data processing habits have laid a curse for more serious academic fraud in the future.