so we say to them how did you know the validity of his being infallible and the existence of his infallibility? is it by the necessity of reason or by his view or hearing a continuous report from the messenger of god may god bless him and grant him peace that gives necessary knowledge? there is no way to claim necessity or to claim a continuous report that provides necessary knowledge because all creation shares in its comprehension. how can he claim that when the origin of the existence of the imam is not known as a necessity but rather there are those who dispute it. so how do you know his infallibility as a necessity even if you claim that by the view of reason? the view of reason is… you have falsehood and if you heard from your imam that infallibility is obligatory for the imam then why did you believe him before knowing his infallibility through another proof? and how is it permissible to know his imamate and infallibility merely by his saying?
فنقول لهم وبماذا عرفتم صحة كونه معصوما ووجود عصمته أبضرورة العقل او بنظره او سماع خبر متواتر عن رسول الله صلى الله عليه وسلم يورث العلم الضروري ولا سبيل الى دعوى الضرورة ولا إلى دعوى الخبر المتواتر المفيد للعلم الضروري لان كافة الخلق تشترك في دركه وكيف يدعي ذلك وأصل وجود الأمام لا يعرف ضرورة بل نازع منازعون فيه فكيف تعلم عصمته ضرورة وان ادعيتم ذلك بنظر العقل فنظر العقل عندكم باطل وان سمعتم من قول إمامكم أن العصمة واجبة للإمام فلم صدقتموه قبل معرفة عصمته بدليل آخر وكيف يجوز أن تعرف إمامته وعصمته بمجرد قوله