Explaining the Contradiction and its application in principles and jurisprudence with an approach to the perspective of shahid Sadr

   Interference   is the important issue in  methodology  and   intellectual   debate   by  which  Usulis   can  solve  problems  of  the  contradiction   among  edicts  in  obedience   position.  Shahid Sadr   has   excluded   the  interference   from  real  conflict  and included it  in the entry   part.  From the  view  point  of  object  of  association ,  despite  of   difference  in dividing , it  can be   summarized  in  three  sentences:  interference  from   lack of   capacity  of legally  commanded   person(mokallaf) , interference  from precedence  of   unlawful issue  for  obligatory  and  interference  from casual correlative  two external act Conflict arises in the field of rules and criteria ;  when    preference  of object  of  association  of  one  of them  is  forced , the  preference  in the  first   issue( edicts) of  duties  of  the   legally   commanded  person  and  the  second  issue ( common basis)  is  by  the  master.  The requirement  of the  primary  rule  in the  interference  among  edicts  is  disambiguation  and  it  is  not  among  common basis, because,   it  is  impossible  to  gain   the  intellect.  The  most  important   result   of  balance  and equality  between  two  interference   edicts   is  unity and plurality  of  punishments.   If   interfered  edicts  are  not  equal    importantly ,     the  edict  which  is   more  important    precedes other  one.  However, Usulis   have  mentioned   different   preferable  edicts in terms  of object  of association  of  edict, each  of  them   has  many effects in different issues of urisprudence. Since  jurists   have   difference  in   interference  and  its    categories   and  are  responsible  for   it  and  its  correction  ways ,   it  is  important  to  investigate  it; thus,   authors    have   investigated   it   by  descriptive-analytic  method.