Analysis of Solutions to the Contradictions among Hadiths concerning the Subject of "the Forgetful Person’s Prayer in the Unclean

One aspect of "praying in an unclean cloth or body" is that a person prays in an unclean (cloth or body) forgetfully and remember after completion. In this case, there are three theories and the main cause of the difference is the contradictions of hadiths. In this research, we have pointed out solutions stated for resolving this contradiction in the library method and in a descriptive-analytical way, in a problem-oriented style, and have dealt with studying and criticizing them. The removal of contradictions is in a way that if the forgetful person is responsible in forgetting and has been negligent, his prayer is void, but if his forgetfulness appeared with his fullest observation and attempt, his prayer is accepted and there is no need to repeat it; the reason for this result is that: firstly, Imam Sadiq (P.B.U.H.), in the Sama'a hadith has said that the restitution of prayer is caused as a punishment and it is meaningful when forgetfulness is due to irresponsibility; secondly, the word "then you wasted" in the valid narration of Muhammad Ibn Muslim points to the lack of effort of the person; it is clear that in case of his full attention the word "waste" is meaningless.