Is it the media's job to ask questions, no matter how stupid?

Is it really the media's job to "ask questions," no matter how batty?

Michael C. Moynihan busts Andew Sullivan for his frenzied attack on Palin, where

despite the chronological impossibility—to which he was previously so attentive—of the child actually belonging to the governor's daughter, Sullivan proclaimed:

"Now all we need is confirmation from the obstetrician who delivered Sarah's baby, Trig."

Oh please... how on earth did the baby become a story at all, let alone some crazy idea of it being hers.