"You won't hear any apologies from me," said Dr. Stephen Ostroff of the Centers for Disease Control. "Anyone who continues to maintain that there was some mistake here doesn't understand the way science proceeds." What isn't Ostroff apologizing for?

Send your answer by noon ET Tuesday to newsquiz@slate.com.

Thursday's Question (No. 317)--"She's Still Got It":

"We are quite the best country in Europe. In my lifetime all the problems have come from mainland Europe, and all the solutions have come from the English-speaking nations of the world," said Margaret Thatcher in her first speech at a Conservative Party conference since stepping down as prime minister in 1990. Lady Thatcher was inspired to speak by a particular cause. What?

"Raising money for the Pol Pot Leisuredome."--Barbara Lippert

"Oh, when will the western European rappers make peace with the eastern European rappers?"--Francis Heaney

"National If English Was Good Enough for Our Lord Jesus Christ, It's Good Enough for Me Day."--Michael J. Basial

"Pat Buchanan's A Republic, Not an Empire. (She was dictating the foreword.)"--Raymond Chen (Anthony D. Stone, Larry Renbaum, and Eric Akawie had similar answers.)

"PinochetAid concert."--Cathy Christianson