In honor of President's Day, Groupon offered a $10-off-coupon . . . because Alexander Hamilton is on the $10 bill, and according to them he's, quote, "undeniably one of our greatest presidents."  The only problem is, Hamilton was never president.  He was, however, the first Secretary of the Treasury.  Someone pointed this out to Groupon, but instead of admitting their mistake, they said quote,  " We respect everyone's beliefs.  You're certainly entitled to your opinion."

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