well, the light or noor of imamat passes from one imam to the other so does the knowledge of understanding of the holy quran.. an imam does not hav to learn to interpret the quran.. he already knows it.. Ali's (A.S) character is a physical aspet that cannot be passed on but knowledge of quran is somethin that is passed on wid the imamat.. that's the whole point.. imam is a spiritual guide in the matters of religion.. so he already has the knowledge of the Holy Quran when the noor of imamat is passed on to him..
i don't remember the reference of hadith about talking quran but u can ask the shia members on gupshup.. they will give u a reference for sure.. 100%
u say that one cannot interpret quran without knowledge of hadith n sunna???? who told u that?? The Holy Prophet (S.A.W) has a hadith in which he says that if we hold on to the QURAN and his (S.A.W) AAl(meaning progeny) then we'll never go astray.. this hadith clearly mentions the holy quran n ahle bait.. now u can go on n put sunnah instead of AAl, we all know that's been CORRUPTED just like hundreds of other ahadith in bukhari n muslim...
So you are using a hadith to prove that you don't need hadith to understand Quran.....funny.
Can you provide a reference from Quran that proves that an Imam or leader of the muslims doesn't need to learn Quran because he already knows everything???