Read this: The report "Mary: Faith and Hope in Christ", by the Anglican-Roman Catholic International Commission, concluded that the teaching about Mary in the two definitions of the Assumption and the Immaculate Conception can be said to be consonant with the teaching of the Scriptures and the ancient common traditions. But the report expressed concerns that the Roman Catholic dogmatic definitions of these concepts implies them to be "revealed by God", stating: "The question arises for Anglicans, however, as to whether these doctrines concerning Mary are revealed by God in a way which must be held by believers as a matter of faith."
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): What type of interpretation did the group believe was of concern in regard to Mary ?
The question arises for Anglicans, however, as to whether these doctrines concerning Mary are revealed by God in a way which must be held