A little while ago I motioned that whenever I listen to George Bush Junior speak all I can hear is human equivalent of a background hum. He's so heavily scripted in short media friendly sound bites, largely because he can’t be trusted to string a sentence together if left to his own devices, that I hear the sound but not the words. This isn’t just an affliction of American politicians however. Jack Straw, the Secretary of State for Foreign and Commonwealth Affairs suffers from the same problem. All sound and no content. Next time you see him on the TV or hear him on the radio, not surprisingly radio is best for this, try to remember what the interview was about afterwards. Bet you can’t…