If a true divine report states that an act will not occur, its occurrence would conflict with the truth of that report. The report is infallible. Yet it does not follow that the act’s meaning contains an internal contradiction.
The certainty of an outcome must be analyzed separately from the abstract character of the action being considered. One concerns the report's truth; the other concerns the kind of act described.
Failing to distinguish truth of a report from intrinsic impossibility creates the later objection that a contradiction would necessarily follow.