Maputo: On blood, i have had success in asking question along: "The bible says we must 'abstain from blood' and i know how the scholars in the WTS has interpreted those words to create a functional law and i am trying to understand the logic they used. As i see it, to turn that into a functional law like the WTS has done, we must have some very clear definitions af those two key words, abstain and blood. So try to define when a substance is 'blood' and what it means to 'abstain from' something in the biblical sence".
The key is that it is impossible to get definitions of those terms that does not involve the actual rules and regulations - for example, what part of his definition of 'blood' and 'abstain' make it clear it is okay to mix 10'000 packets of blood to extract albumin and inject that?
When you have done that, take a historical study. The exact same verses they use for blood today has been used on vaccines and organ transplants. Why did the definitions change? What were the definitions back then?
I think your goal should be to admit that the FDS definitions are somewhat arbitrary and people abstain from blood NOT because it is perfectly clear from the bible what treatments are allowed and not, but as a matter of respect for 'Gods organization'.
That being said, i would try to nail him on interlectual honesty, for example the creative quoting and misrepresentations in the 'Creation' book. Google it to see what i mean, a good place to begin is to notice what 'Evolutionist' they keep on quoting, cough cough: http://en.wikipedia.org/wiki/J._Francis_Hitching