You are listening to a court case in which Rufus, whose car collided with another, is accused of driving at twice the speed limit in the city and with three times the legal limit of alcohol in his...

You are listening to a court case in which Rufus, whose car collided with another, is accused of driving at twice the speed limit in the city and with three times the legal limit of alcohol in his blood. Rufus denies the charges but the doctor who attended the accident tells the court that Rufus smelled very strongly of alcohol and that blood tests showed alcohol in his blood at three times the legal limit. Who is credible and why?