Board Thread:Editor Board/@comment-3551173-20131004024806/@comment-6697950-20131010142909

In that case, it's a case specific thing. Since both of them are officially published, the best option would be to combine both versions in a way that they would be as least conflicting as possible. If not, we're likely going to go for the version that was the most recently published, because newer books will most likely follow the Progressive version, as it is more detailed.