[lepton]

If I were the prosecutor and Wilson and Plame testified to the grand jury that it was a big secret that she worked for the CIA, I'd want to find out if that were true. If not, it's perjury.

Well, you'd also have to prove that they aren't just idiots that didn't know everyone knew. As we found out during the Clintont years, proving someone is not an idiot can be difficult (See Hillary and WH Travel Office firings).

[Brilliant]

First you ask them if they knew she worked for the CIA. If they say "yes," then you ask them how they found out. If they say, "Joe and Valerie told me," then Joe and Valerie better not have told the grand jury that it was a secret.