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Groupon made a big mistake -- and then claimed it was a marketing stunt.

For Presidents' Day, the discount site offered a $10 discount to honor Alexander Hamilton, the face on the $10 bill and, according to a press release, "undeniably one of our greatest presidents.” Problem is, Hamilton was never president, just Secretary of the Treasury. Groupon later claimed the gaff was intentional, to garner media attention. Or was it an embarrassing boo-boo from an intern?

So many phones, so little time. How do you decide? Gizmodo can help you navigate the wealth of new smartphone options with a nifty new chart that asks the important questions: "What kind of phone do you want?" "Does it have to be new?" and so forth. Answer a few questions and you’ll know whether to get a Nokia 1520, an iPhone 5c -- or a Motorola flip phone from 1998.

Finally, a new app allows you to listen in on -- and help out -- someone else's conversation. Crowdpilot lets you crowdsource your conversations by inviting a group of people to listen in and give you suggestions in real time -- sort of like a “wingman” in a bar. Just launch the app, choose from an array of conversation types including date, argument, meeting, or family gathering, and choose who you want to listen in.

Our take: The NSA has to be secretly behind this. #WeSmellAConspiracy.

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