regarding islamic laws, there are various issues faced by muslims in their daily lives. e.g. doubts in "salāt" and their corrections, conditions which invalidate a fast and the relevant compensations, rulings vis à vis correctness or incorrectness of various social and business practices e.g. investing in mutual funds, use of alcohol based perfumes and medicines, etc. yet, akhbaris say that the imams mentioned general-rules that we may use to know the ruling of modern issues.