Causality Relationship and Liability of Ta,addi or Tafrit

As to causes of civil responsibility , ta,addi or tafrit are mentioned as independent causes. Article 493 civil code of Iran, about rent and also art. 1238 , about the responsibility of guardian, seem to say that the liability of guardian and lessee is absolute and need not to proof the causality relation when they are acting in such a manner of ta,addi or tafrit. A lot of jurists and Islamic juristconsult have tendency to this viewpoint. This essay believes that such viewpoint is not consistent with the legal principles and justice rules. So this article prefers the interpretation which requires the existence of causality requirement. Such liabilities need proof of causality relationship.