Review and critique on Shia and Fakhr Razi's arguments On how to determine Imam

Ashari and the moste of Mutazilite blive on the people must determine Imam. Based on their interpretation of this, there is two facts: first, the legal obligation is the religious necessity, not rational necessity, and secondly it is a task people not duty to God
In this article we have tried to show the shite arguments on determine Imam is a duty to God not people. Such as: 1) The rule of Emkane -Ashraf, 2) The need to protect religin. 3) the favor Intermediate. 4) the general guidance. 5. the principle of LOtf.
Some arguments of Imam Fakhr Razi on the people must determine Imam are: 1) Introduction Imam prevented Loss. 2) determine Imam is preliminary to the absolute obligations.
In this article, Fakhr Razi is criticized and answers his bugs on Shiite arguments.