Aban's Sahiha is a report on diyya (blood-money). According to it men and women's blood money will be equal if it is less than one third of full blood-money, if not, women's blood money will decrease into the half of it. This is told by hnam Sadiq, peace be upon him, to Aban. Considering his surprise, hnam Sadiq, peace be upon him, asked him not to make any comparison between them.Aban's Sahiha has been linked up with many general issues of deduction. Some of them which are discussed in this paper are as follows: paralogism, right of priority, reliability of intellects judgment, possibihty of discovering criteria for issuing legal deeds, legitimacy of amputation, and so on.Viewing this report from different perspectives, the author of the present paper tries to illustrate its impact on understanding religious deeds.