Unique concept, separate concepts And their role in explaining the fundamentality of Being

Among recent philosophers, mollasadra's thoughts and ideas especially that of the fundamentality of existence , putting a great influence on discussions of philosophy, has transformed the previous philosophical structure, called the quidditive system to challenge and presented new ideas in lots of philosophical issues such as Making, Causality, Movement, Unity, Multiplicity, etc .Although the fundamentality of Being has been discussed numerous times in the works of Mulla Sadra and his followers, it is still ambiguous from some basic points of view.
Careful revisiting of the issue, we conclude that fundamentality of Being is the neighbor's next door to the first proposition of philosopher. Rather it is more accurate interpretation of the proposition and following it, acceptance of any statement other than principle of reality (the first proposition) will be meaningful . After accepting the reality itself , logically the first question is "unique" or "separate" regard of reality which is a dichotomic division and has no third alternative. By fundamentality of Being, we mean that reality is “unique”. Therefore, the object of fundamentality is absolute being.