There was a pretty interesting post over on Slate Star Codex the other day that I thought might be of great interest to the folks around here. It discusses, among other things, some of the real dangers hard-takeoff superintelligences might pose.
http://slatestarcodex.com/2015/05/29/no-time-like-the-present-for-ai-saf...
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"I wonder if in some weird Freudian way, Kojak was sucking on his own head."
- Steve Webster on Kojak's lollipop