Marion Jones says she is "shocked" (shocked!) that she tested positive for EPO. She hasn't yet offered a more specific excuse, though her coach floated a conspiracy theory yesterday.

The reality-based community is less than shocked. Before last week, the evidence against Jones was already pretty strong, even without a positive test.

Why would someone under such a cloud of suspicion still risk it? As Lynn Zinser explained over the weekend, probably because she didn't realize they were testing sprinters for EPO, a drug usually considered helpful only for endurance athletes.

The reaction has been harsh. Adrian Wojnarowski: "She deserves whatever embarrassment comes her way now, because she did as much damage to her sport as any other athlete in history." Bill Plaschke: "a great big fat lying drug-cheating athlete."

It will likely get harsher still.