An analogy is a useful rhetorical device for visualizing a principle after it has been established, but does not an argument make
Or as Plato said:
“Arguments that make their
point by means of similarities are impostors, and, unless you are on
your guard against them, will quite readily deceive you.”
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I've explained the flaws in the "abstain from blood" argument at length.
When it comes to the first abstention, (things sacrificed to idols) the JW's readily acknowledge:
a. That "abstain" negates actions, not objects
b. That a finite act is required to complete the thought
c. That in this case, that act is idolatry.
d. That what the Decree actually forbade was therefore the eating of an idol sacrifice as part of a pagan ritual. (I am quoting from JW literature here.)
The honesty of JW writers on this matter is required to resolve what would otherwise be a serious contradiction in their teaching.
The second abstention (blood) is governed by the exact same rubric. The rules of definition and grammar don't change from one sentence to the next and they certainly don't change in mid-sentence.