You can't. What is stated in the paper is the requirements of the topic. When the time comes to reply, it is impossible for the teacher to ask data and sources and related questions, but it is still necessary to be consistent to be convincing. The data in graduation thesis must be true. Under normal circumstances, the teacher will not let you demonstrate the process of data analysis when defending, but will generally ask you the theoretical basis of the paper, how the data was collected (that is, through what channels), your questionnaire design, data analysis results, conclusions and so on.