He did give a permission to restore the posts (I didn't ask about comments), when I contacted him originally. There remains the issue of someone being technically able to restore these posts.
We have the technical ability, but it's not easy. We wouldn't do it without Roko's and Eliezer's consent, and a lot of support for the idea. (I wouldn't expect Eliezer to consent to restoring the last couple of days of posts/comments, but we could restore everything else.)
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