Logic? We don't need no stinkin' logic!

Tim Blair preemptively critiques a threatened speech by John Kerry:

An email arrives from johnkerry.com:

Dear Friend,
Later today, I will deliver a major speech on the war in Iraq.
It asks a hard and essential question: how do we bring our troops home within a reasonable and responsible timeframe, while achieving what needs to be achieved in Iraq?
One thing is certain. It isn't by continuing to pursue the Bush administration's “stay for as long as it takes” rhetoric.

Pretentious blowhard. If “achieving what needs to be achieved in Iraq” is key, how does one avoid the requirement to “stay for as long as it takes”?

And doesn't the Kerry campaign know better than to send emails to Tim Blair?