yeah that sort of ties into another idea I have that her prophecy doesn't actually allow her to see the future, just things that are going on at the time but in different places from where she currently is (still a powerful tool, just not future sight). for example she would have seen that these plans have been set into motion, not actually seen a future vision with Euron, Joff, etc. being killed. this is why her prophecy is unpredictable.
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no misuzu aliens did it