Here is how I brought it up.
Jehovah's Witnesses are not required by leadership to "abstain" from blood. They receive dental work, and their blood trickles down their throat. They are able to receive organs which are matched to donors and always contain trace whole blood. They give their blood whenever asked from medical personel in order to be tested, heated, prodded, poked, put under a microscope, cultured, or whatever else a lab may do with it.
They talk about blood. They bleed. They prick their finger and put their finger in their mouth so as not to get it n their clothes and encourage clotting.
None of this is abstenence.
At this point the JW is rolling their eys and saying thats just silly. Those are minor things, that isn't what the scripture meant.
Aha! So you mean there is CONTEXT to "abstain". There is a qualifier of some kind. We are allowed to think about blood, say the word blood, ingest a little blood, give freely of our blood to our doctors....and still abstain from blood. So who determines the context?
Once we are this far down the hole, the person is usually done.
One brave soul said what others have thought. The "pouring out" of the blood happens eventually. Meaning the blood we donate for testing is discarded at some point, therefore it is perfectly in line with the bible.
Well......I guess.