But Mary’s IC and sinlessness is said to be part of “oral tradition.”
Apophasis, who said that the doctrine of the Immaculate Conception was handed down by “oral” tradition? Are you confusing “oral” with “apostolic”? Apostolic would apply to the ordained successors of the apostles as well: the popes and college of bishops. Or did someone on this thread erroneously say “oral” tradition? We know things by Sacred Tradition, which includes the “oral” teachings of the apostles eventually put in writing. Only Luke clearly alluded to the Immaculate Conception. Perhaps somebody meant this fact. But the Magisterium of the Catholic Church authoritatively made this Marian truth ‘explicit’. This dogma is included in the Deposit of Faith: Sacred Scripture and Sacred Tradition.
Just as the written, N.T. Scriptures are.No. The challenge I’ve put fourth in all of my posts on this thread is for proof that any Apostle taught the IC conception or the sinlessness of Mary. No one has met that challenge yet - including you. You simply went off on another tangent (like the rest on this thread).
Apophasis, of all the New Testament apostles who have implicitly “revealed” or taught what has become the dogma of the Immaculate Conception is Luke. It is possible that he himself had no clear understanding of what he was writing about, for there was no concept of original sin held in Judaism at the time. But he was compelled by his divine co-author to write the verse we find in his Gospel, 1:28: “Hail, full of grace. The Lord is with you.” It is also possible that Luke intuited by divine grace that Mary was sinless, just as Peter had intuited the divinity of Christ by the grace of God. In any event, the Greek word ‘kecharitomene’ translated as “full of grace” is perfect passive participle; so we are speaking in the past tense, not present or future tense. The grace Mary is acknowledged of possessing does not ‘directly’ allude to a child she will bear in the near future; nor does this grace originate in the present upon the announcement of this child made by the angel Gabriel. Mary was in a state of sanctifying grace from the moment of her conception on account of the child she would bear (Future Conditional: Cf. Luke 1:30-31). The Word was to become flesh and sinless, and to be just like us but without sin, having been “born of a woman, born under the law” (Cf. Gal 4:4), He could not have inherited the stain of original sin. This would be unbecoming of the New Adam. The more you Protestants remove Mary from the entire picture, the more God becomes less a man, and the more we have a less chance of being redeemed! And so Luke “teaches” us that Mary was conceived without original sin. The other apostles of the New Testament texts do not mention the Annunciation as Luke has, for the significance of this passage was not revealed to them at the time they wrote their gospels or epistles. They were guided to write about other things concerning God’s plan. Still they may have known about it, or perhaps God decided that only Luke would know or write about this implicit truth. Paul never mentions the story of the Virgin Birth in his epistles, but I’m sure he knew about it and believed in it. Let us not suggest that because he abstained from mentioning the Virgin Birth that this supernatural event did not occur. Nonetheless, Luke 1:28 refers to the spiritual state of Mary. This verse implicitly reveals her Immaculate Conception. I trust I have met your challenge. If I recall, I wrote above that I would.
Apophasis, in the verse you cite, (Jn 14:26) Jesus is speaking of the things he had already said alluding to his ‘future’ death and Resurrection. It concerns the past: "He (the Paraclete) will remind you of everything I ‘told’ you.’ I have a subsequent passage from John in mind, which refers to a time after the death and Resurrection of Jesus, and which indicates a continuation in time in the life of the Church established by by our Lord. Divine revelation does not cease to unfold with only what is explicitly contained in the written Word. Isaiah spoke of the suffering Servant, but he had Israel in mind. The prophets addressed both present and future generations.The Paraclete makes known in time what is to come: “I have much more to tell you, but you cannot bear it now. But when he comes, the Spirit of truth, he will guide you to ‘all’ truth. He will not speak on his own, but he will speak what he hears, and will declare to you things that ‘are coming’ ( not that will come: Future, but after Pentecost: the Present Continuous)” (Jn 16:12-13). These things include our Marian doctrines.
OK. I googled Ecclus. xxiv., 5 And found a link. 
