Well, since there is actually NO SUCH THING, anyone who says they knew what it was is a liar. Anyone who claims they knew what it was should provide a link to the administration issued "Doctrine".
Charlie Gibson: “The Bush doctrine, as I understand it, is that we have the right of anticipatory self-defense,”
Charlie Gibson 2001: ““The president in his speech last night, very forceful…He also outlined what is being called the Bush Doctrine, a promise that all terrorists organizations with global reach will be found, stopped and defeated.”
James Fallows: Gibson's own minor mis-statement. American foreign policy has long recognized the concept of preemptive action: if you know somebody is just about to attack you, there's no debate about the legitimacy of acting first. (This is like "shooting in self-defense.") The more controversial part of The Bush Doctrine was the idea of preventive war: acting before a threat had fully emerged, on the theory that waiting until it was fully evident would mean acting too late.
Lou Dobbs: “Bush Doctrine: you're either with the civilized world or against us in the war against terror.”
Richard Deats: The Bush Doctrine is the natural development of a U.S.-centered world view in which the United States unilaterally pursues its objectives as it sees fit. The Kyoto Treaty can be ignored, the ABM Treaty violated, the Land Mines Treaty unsigned and the space-defense shield given massive funding,
Charles Krauthammer (who coined the phrase “Bush Doctrine”): “the Bush Doctrine, now taking shape as the Administration takes power. Its motto is, We build to suit--ourselves. Accordingly, the President and the Secretary of Defense have been unequivocal about their determination to go ahead with a missile defense
Dan Froomkin: to be completely accurate, there have been several Bush Doctrines over the years.