In 2004, NCAA Vice President of Enforcement David Price explained the Corey Maggette situation:
"Our executive regulations specify that if an individual plays while ineligible in the NCAA championships, we can either vacate the team's participation in the championship and/or assess a fine for the money that they received. The standard for that is whether either the institution knew or should have known that Maggette was ineligible or if Maggette himself knew that -- or should have known that he was ineligible. After a lengthy investigation, we came to the conclusion that there was insufficient evidence to determine that Maggette knew or should have known, and we believe firmly that the institution did not know and should not have known."

1) Maggette had long ago testified under oath that he'd taken money. So could the NCAA say that he didn't know he was taking money?

2) Duke wasn't penalized because it did not know and should not have known that Maggette was ineligible.