Studying the Scope of Rule obscenity for unstated punishment in doubt of matter

Concerning either enforcement or non-enforcement of the rule “obscenity for unstated punishment” (rational acquittance) around the "doubt of matter", two views can be recognized by learned men of Usul . One of them is that the rule is applicable to the ''doubt of matter'' and also to the ''doubt of law''; but, the other view denied the enforcement of rule to "doubt of matter". The partials of two above-mentioned views have relied on some proofs ,as, studying of their proofs and criticize for their views has guided us towards the third view. According to the theory accepted by us, since ''doubt of matter deducted from sharia (Islamic law)" are like the ones deducted from the law, then, enforcement of the rule is of no problem. Of course in this case, where, the instances of dubiety consist of properties, life, chastity and credit, so, because of ''sovereignty rule'' and of ''wise men approach'', these will be out of the scope of inclusion rule. Furthermore ''rational acquittance'' will not be applicable in non-deduced canonical issues.