There are no other historical records concerning Mary's death either. So the Church scholars simply decided that she should have been assumed. But they've been wrong before. Didn't they also at one time proclaim that the earth should be the center of the universe? Evidence proved them wrong. If Mary's grave were to be found, and DNA evidence proved it to be authentic, would the Church then reverse its teaching on the Assumption? What happens then to all the arguments why she should have been assumed into heaven?
My point is that it doesn't make any difference whether her body decomposed or magically dematerialized. She was holy and blessed, and bore a son who was human. In the absence of evidence, and the irrelevance of the outcome, doesn't it make more sense to believe what is believable?
Baloney.
Do you have a citation for that?