Beda is one of the verbal and philosophic discussions originate from Quran and Sunnah. Shia scholars show more interest in this regards comparing to the other Islamic groups, providing clear definition and logical approaches. Inspired by different narrative documents (Quran and Sunnah) and intellectual reasons, Shia characterize different dimensions of this subject. Thus, they specify Beda as the Imam based Shia properties.Since the ancient times, because of the Beda influence on religion knowledge (theology, destiny, authority) and its interpretation complexity, the opponents suggest variety of challenges, suspicions and questions in this regards.Currently, MR Nasser Ghafghazi raises some suspicions about Beda in his book (Shia religion principle). In the present work, based on our ancestor manner and avoiding irrational prejudice, we attempt to demonstrate Beda on scientific and rational logics in Shia ideology. Therefore, this study provides good response to his suspicion and illusions, defending the Shia rights.According to the books outlines, we classify the most important suspicions in the following 5 categories:1. Beda is not mentioned in Quran and the prophets Sunnah.2. Beda necessitates the ignorance in theology.3. Beda as an Islamic thought or non-Islamic phenomenon4. Claiming the divine science for Shia Imams5. Beda in Shia Imams successions