"Jim, Jim, Jim.... The problem I called attention to is "selection bias" "
Don't be a fool. You did not draw attention to any problem but one that is in your own head. Now stop wasting time, and shut up. -- James Heartfield The 'Death of the Subject' Explained is available at GBP11.00, plus GBP1.00 p&p from Publications, audacity.org, 8 College Close, Hackney, London, E9 6ER. Make cheques payable to 'Audacity Ltd'