TD, What I gather from your post is that, to God, the sacredness of life is more important than the sacredness of blood so when it comes down to an issue between the two, we should choose life. We know this because of all the other laws God has made regarding life and how important it is to him. It is taking the blood issue in the context of the whole bible. Like was mentioned before, the life itself is more important than the symbol of it.
However, some of your post is too hard to understand:
Consequently, apart from serving as a good example of how the inductive fallacy of hasty generalization can be coupled with the deductive fallacy of argumentum ad ignorantiam, their hypothesis would be worthless.
Would you please explain the first part of your post, about the reasoning methods JW's use, in simpler language?