Is al-Kafi completely authentic like Sahih Bukhari?
Reply to the Statement of al-Kulayni which is mostly considered to be the acceptance of his all the hadeeth in his book to be Saheeh. Al-Kulayni, in his introduction of Al-Kafi, wrote: “Verily, you solemnly wished that you possess a book (Al-Kafi) which is sufficient, brings together the entire Islamic sciences of the knowledge of religion within it, wholly satisfies the needs of the student, acts as a reference for the seekers of guidance, and would be used by those who want to attain the knowledge of religion and practice upon it by deriving Saheeh (authentic) narrations of the as-Sadiqayn (truthful ones) (as) and the upright and acted upon traditions from it—through which the compulsory duties of Allāh, the Powerful and Exalted, and the tradition of His Prophet (saws) can be fulfilled." Comment: The statment says "Saheeh narrations from as-Sadiqayn, where as-Sadiqayn are al-Baqir and as-Sadiq. Now the question is, did al-Kulayni only narrate from as-Sadiqayn