Its not my favourite part of the BB but in the pre internet pre TV pre smart phone pre multi recovery choices context in which it was written it makes a kind of sense.
I'd contend - and I have said it before - that anyone who's been looking for and found SR has very likely already tried that test and many others.
I hope that you can make some good from it and draw a line under you and alcohol Schizodoc.
I reckon thats the outcome the writers wanted
D