A recent author of a comment on this blog very reasonably argued that Pius XII, if we perform a holistic reading of Munificentissimus Deus and apply a hermeneutic of Continuity, actually does teach that our blessed Lady died. The very same day, I received an intelligent email from a friend who found it repugnant to imagine that she could have been dead, even for a moment. One can, indeed, argue that the restraint of the actual Definition is laudable for not imposing beyond what is necessary upon either 'side'. Fair enough. I am no Torquemada.
But I would add the following: the lex orandi should help us to constitute the lex credendi (I am not too sure what I think about a proposal of Pius XII that this venerable tag operates both ways round). And this suggests to me a massive bias towards the immemorial assumptions of the common ancient traditions of East and West as found in their liturgies. And why should this symphonesis be a problem rather than a source of joy?
And I will repeat a point I made originally: that, as a result of the apophaticism of the Definition, the originally common traditions of East and West have de facto disappeared from the consciousness of the West. Can this really be a matter for denial? It is easy to get the impression that the Western Church regards the old apocryphal stories of the death, burial, and Assumption of our Lady with suspicion; as being rather dubious and 'medieval' and politically incorrect 'folk religion'. Indeed, they are not canonical Scripture. But our ignorance of them means that we can see a medieval alabaster, or mural, of the Assumption - or a Byzantine ikon of the Dormition - and not have the faintest idea what on earth they are all about. Why is that man shown on the Ikon with his hands chopped off? Why did the priest after Mass/Liturgy this morning bless and give flowers to the congregation?
I do not think it was wrong of me to discern something (in Ratzingerian terms) of a Rupture in Pius XII's Definition. Rather like those Conciliar formulae which were designed to be interpreted in different ways by different people! Rather like a certain recent Apostolic Exhortation which quoted Familiaris consortio ... and missed out half the paragraph! This sort of game has become all too tempting to the modern papal machine.
But, even if I was wrong, I suggest that we revisit these stories, even if only to enrich our capacities for perception and comprehension in the field of Christian archaeology and Art History!!
SO ... If you, happily, possess a pre-1950s Breviary, you could have a look at the Mattins readings for today, the IVth Day within the Octave of the Assumption. Otherwise, google your way to (pseudo-)Joseph of Arimathea The Passing of the Blessed Virgin Mary.