It has long been suspected that Mr Bush employs a string of lookalikes for difficult or dangerous speaking engagements, some of whom may have had their ears specially enlarged for the task.
Most of those who regularly monitor Mr Bush's speech patterns believe that it was the genuine article who spoke at Central Command HQ in Florida yesterday, pointing to a characteristic tendency toward quasi-biblical phrasing - "There will be a day of reckoning for the Iraqi regime, and that day is drawing in near" - and an almost total absence of words of more than three syllables.
Other experts disagree, pointing out that these consistencies originate with speech writers rather then the president himself, and that Bush's main vocal technique - the bewildered pause - is only too easy to imitate.