The post he quoted has spoilers too. The show has not talked about
And the books hadn't revealed it by this point in time either. It is similar to Jamie's speech in the bath with Brienne....it is something from a person's past that hasn't been revealed. Not all spoilers take place in the future.
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Brooklynzson you should edit everything on that last page that mentioned or quoted it. Just because the person who talked about it hasn't read the books doesn't mean it isn't a spoiler. It most definitely is, it is important material from book 4