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Published: Aug. 15, 2017, 9:03 p.m.

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This week we talk about QR codes, security theater, and hacking HBO.

We also discuss Dunbar\'s Number, getting free meals for a year, and being rude to robots.

This is a public episode. If you\\u2019d like to discuss this with other subscribers or get access to bonus episodes, visit letsknowthings.substack.com/subscribe'