Instant Index: Groupon Goof for President's Day

Diane Sawyer reveals the stories people have been buzzing about all week.
3:00 | 02/17/14

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Transcript for Instant Index: Groupon Goof for President's Day
Our "Instant index" begins with a little mistake from the popular site groupon. For president's day they honored the $10 discount for the man on the bill. President are Alexander Hamilton. One problem, Hamilton is never president. He is on the bill but he is the nation's treasury secretary. Groupon may have openings for fact-checkers tonight. And a supreme court ruling on the vital national debate about pizza, finally. Does deep-dish truly qualify? Supreme court justice antonin Scalia, told Chicago, home of the deep dish it should not be called pizza. It's very tasty, but it's not pizza. It is tomato pie. Sa Leah believes pizza should be thin and crunchy, like his home in New York. And tonight, mystery solved. How did they come up with the costumes, spandex, sparkle? Fashion or a tax write-off? A former band member revealed under Swedish law, wild costumes are tax deductible because they can never be confused with street clothes, hence the flashy suits which ensured a nice tax-savings from the group.

This transcript has been automatically generated and may not be 100% accurate.

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