hey i got a idea......

why dont you get your doc. friend and stick him in a car with you and like 5 other bud smokers you know and just blaze hard with him in the car and let him answer it for himself....

my opinion is this.... your body can only absorb so much smoke (thc-9, etc.) in a single toke, the rest is exhaled.....
it wouldnt be but a fraction as potent....
but it WOULD get someone a buzz