Don't dance around this. If you can't answer or address then at least be honest about it. What does Hadith mean;
Hadith
noun
a collection of traditions containing sayings of the prophet Muhammad s.a.w which, with accounts of his daily practice (the Sunna), constitute the major source of guidance for Muslims apart from the Koran.
Hadith is the saying of the Prophet s.a.w through a narrator or chain of narrators. The one you've quoted isn't a hadith but a saying of Jaffar Al Sadiq or it is assumed that it's from him.
Your ignorance is mind-blowing: a hadeeth for the shi'a is the saying of a ma'soom, not just what is reported from the Messenger صلى الله عليه وسلم. The fact that you don't know this basic fact just has me scratching my head as to why I'm wasting my time responding to you.
No it isn't from our 6th Imam. Many things in history are wrongly and falsely attributed to them. History has been distorted and messed about by those in authority and power just to undermine and camouflage the truth.
And to keep the Ummah misinformed and misguided about the Ahle Baith and the 12 Imams. This has been going on for sometime and started off at Saqifa. Yes Saqifa was the birth place of such propaganda.
So this hadeeth was made up by Sunnis and added to al-Kafi to undermine and camouflage the truth? Do you honestly read what you post before posting it?
It's got nothing to do with infallibility. You mention something from Al-Kafi which absolutely and completely contradicts our belief and faith. I challenge that this is from the 6th Imam. Just because it's in Al-Kafi doesn't mean it's the belief of the author/writer and is our view when it contradicts our belief.
Read that sentence back to yourself and tell me how absurd that sounds?
And how does the above mean that everything in Al-Kafi is part or should be part of our belief and faith? What was the belief of the author/writer of Al-Kafi? Was he not an Isna Ashar?
Our book is the Qur'an and we believe in it 100%. We have no belief as such about any other book as the Sunnis do. Example, 'Haza Sehih Bukhari Baad Az Kitab e Bari' you know what that means?
No one with a sense of academic honestly believes everything in Bukhari and Muslim is authentic. The fact that you repeat this tired trope just shows you don't have anything to say about the narration, so you just reject it and throw everything by the kitchen sink hoping something sticks.
However, here are some quotes about the books from your major scholars (and not some random transliterated Urdu slogan) that you are so quick to reject:
Shaikh al-Hur al-Aamili said, "The authors of the 4 Books of shia have testified that the Hadiths of their books are accurate (saheeh) , firm and well conducted from the roots that all shia agreed on , and if you consider those scholars (the authors of the four books) are reliable then you must accept their sayings and their narrations . " [Al-wasa’el, vol. 20, p. 104]
Abd al-Husayn Sharaf al-Din al-Musawi said: "Al-Kafi, Al-Istibsaar, Al-Tahzeeb and Mun La Yahduruhu Al-faqeeh are Mutawatirah and agreed on the accuracy of its contents (the Hadiths), and Al-Kafi is the oldest, greatest, best and the most accurate one of them.“ [The book of Al-Muraja'aat (A Shi'i-Sunni dialogue), Muraj'ah No. 110]
Al-Tabrosi (aka, Tabarsi) said:"Al-Kafi among the 4 shia books is like the sun among the stars, and who looked fairly would not need to notice the position of the men in the chain of hadiths in this Book, and if you looked fairly you would feel satisfied and sure that the hadiths are firm and accurate."[Mustadrak al-Wasail, vol. 3, p. 532]