PHILADELPHIA -- Great mysteries of the world:
Who is inspector No. 47?
Why are lemmings compelled to rush toward the sea?
Who built those remarkable monuments on Easter Island?
What's wrong with Donovan McNabb?
Two years ago, the Philadelphia Eagles' quarterback was second in the MVP balloting. Last September he signed a 12-year contract worth $115 million, the richest contract in NFL history. In this season's first two games he has been, to put it charitably, awful.
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