The philosopher John Danaher is doing a series of posts on Bostrom's Superintelligence book. Posts that were up at the time of writing this comment:
Bostrom on Superintelligence (1): The Orthogonality Thesis
Bostrom on Superintelligence (2): The Instrumental Convergence Thesis
Bostrom on Superintelligence (3): Doom and the Treacherous Turn
Danaher has also blogged about AI risk topics before: see here, here, here, here, and here. He's also written on mind uploading and human enhancement.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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