It is commonly said of 'ilm al-kalD.m in general that it is a defensive apologetic, good in the opinion of some Muslims, but not all. Al-GazzD.li thought 'ilm al-kalD.m to be a dangerous remedy, useful only for protecting the faith of the people and silencing heretics.[2]
Aya bii ya Qur'an inazungumzia kisa cha Ammar bin Yasir (R.A.) wakati alipolazimika kusema baadhi ya maneno dhidi ya Uislamu ili kujiokoa kutoka kwa makafiri wa Kikureishi.