If I am new to Islam can you give me one reasonable prove to believe the stories you are telling whether CONT?

whether it is Hadith from Sunna or shiaa or other random religious stories...why can't ALL of these Ahadith be fabricated???what make you trust the History that much blindly...I just need ONE JUST ONE REASONABLE PROVE...To claim that really The prophet Mohamed said these Ahadith and it was not fabricated in the ancient ages Amawi and Abi...