Proof

I know I might get down voted but as Swami Vivekananda says advaita was built on freedom . Freedom to question everything even advaita itself. So I here want someone to provide some logical proof . I have read a lot of books and meditated but to dedicate myself to this path is really difficult for me. I can't until that element of 'Doubt' is eradicated from my mind. I have read other answers and most of them are just filled with confirmation bias. They presume that there is brahman and logically try to reach it. But pls I want an independent analysis no assumptions or something just pure free analysis. I would really grateful to you for my whole life 🙏🏻