Left hand wanking the right? Vice versa?

When a CNN Breaking News E-Mail Alert says the exact opposite of the anchorman on CNN International at the same time, which one is more credible?
This is not a trick question; either Israeli ground troops have entered southern Lebanon to attack Hezbollah bases (via E-Mail Alert), or they haven’t (CNN International). I know, I know, fog of war and all that, but still…