While we believe that according to the principle that...
While we believe that according to the principle that asserts "legal punishments are repudiated through doubts" we must not act without certainty, in the case of "ex-communication" , due to the significant impact that it incorporates, it is even more important than the fixed penalties and thus the Holy Prophet (S) forewarned everybody of ex-communicating someone who is not really an infidel, and stated: "If somebody addresses his Muslim brother as: O Kafir!
(Infidel) and is speaking the truth, the opposite side will be ensnared in divine retribution, but if he is lying this will return to him." At times certain phrases are seen in the Book and traditions which reveal that a certain word or deed or belief will result in blasphemy, while there are certain obstacles which prevent this ruling. This is similar to the other rulings which are not ascertained without the assemblage of all legal causes and conditions and the elimination of the obstructions.
For instance, heritage is one of the divine rulings which comes with kinship but at times certain obstacles prevent this ruling to materialize, like disparity in religion. Also, there are instances when somebody is forced to utter blasphemous statements but it does not make him an infidel (as he has been compelled); at times one might utter a blasphemous statement in a state of excessive joy or anger (when one is not in control of his emotions) and it would not lead to his infidelity.