One of the biggest tech stories of last week was Google’s demonstration of its newest AI service, Google Duplex, which held a conversation with a human while sounding just like a human itself—in a demo phone call, the software even interjected a casual “mhmm” into the conversation. The call revealed a highly sophisticated level of language processing. Google was showing off how far its AI technology had come, but it received backlash from critics who worried about the implications of machines that could pretend to be humans. In this issue, executive editor Matt Thompson reflects on what the veneer of humanity in machines says about our own humanity. Then I ask a couple of AI ethicists to review the ethics of developing human-like machines in the first place.

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