Microsoft grounds foul-mouthed teen-speak bot

A Microsoft "chatbot" designed to converse like a teenage girl was grounded on Thursday after its artificial intelligence software was coaxed into firing off hateful, racist comments online.

Twitter lets hot tweets rise to top of timelines

Twitter revamped its timeline Wednesday, allowing the "best" tweets to rise to the top, despite warnings of a revolt from members loyal to the real-time flow of the messaging platform.

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