The Reasons of Priority: Criticized and Analyzed

As a descriptive-analytical research deploying a library and documentary methodology, this study has mentioned the classifications of priority and has stated the problem of the study and has defined the key terms operationally. Finally, four types of priority have been distinctively presented:
1. Custom or verbal priority which is divided into two kinds of enunciative and conceptual priority
2. Rationalistic or definitive priority. Certainty priority is also annexed to this type.
3. Consensus priority.
4. Speculative priority or analogical deduction   
To investigate the conditions of the authority of priority reason, it was revealed that affairs such as “lack of disagreement of precept with generality, the rule with the primary principle” and “exclusiveness of the cause” do not matter in this regard, while the following are essential: 1) nullifying the features 2) proving  the cause of precept 3) proving the perfectness of the cause 4) proving the existence of the cause in the secondary 5) proving the strength of the cause over the effect in the secondary. Studying the aforementioned factors revealed that among the types of priority, merely the speculative priority or the analogy of priority would be invalid. The main feature of this type is that it is speculative and there is no verbal realization in it.