Well, for the purposes of the committee.... This is not like a trial. We're not asking you for something exact.
Just in your experience, off the top of your head, what would you expect to see in this person's driving ability if he'd had four drinks during that time? Give me a rough BAC just so that the average person at home can make a determination. I think I've just recited to you a typical evening for people, a typical event. For instance, this weekend I went to an awards event.
I think we need to differentiate between somebody who's drunk behind the wheel and somebody who has a diminished ability to drive. The average person listening to these proceedings, or hearing about them, or reading them, would be given the ability to judge for themselves whether the committee is going down the right path and what our deliberations might result in.