I think I will have to go back over it a few times. It’s been a while since I have considered an ‘intransitive verb’ and a ‘finite verb’. Grammar was not my best subject.
It can be confusing. I notice somebody on the board Bobcat mentioned above read through the entire post including the examples and didn't understand one single, solitary word it
Abstain and its synonyms (Refrain, Forebear, etc.) negate action. The fundamental meaning it to, "Keep or prevent oneself from doing or saying something." (I'm quoting the American Heritage Dictionary here)
When that action is clearly understood, it is normal in everyday, conversational English to omit it, as in, Abstain from fatty foods or Abstain from wine. (The individual on the other board mentions sex, but that is not a legitimate example because that word doubles as both a noun and a verb.)
What's actually happening here is that the listener is mentally completing the thought themselves. The former is clearly a reference to eating fatty foods and the latter is clearly a reference to drinking wine
Conversational English is not the same thing as written composition and using the word, "Abstain" when the context is not clearly understood, as in "Abstain from boat" is most certainly ungrammatical.
This whole conversation can be bypassed with a JW simply by pointing out that they have acknowledged on a number of occasions that the mention of blood at Acts 15 was a reiteration of the prohibition against eating it in the Law. A good example can be found in their older Bible Dictionary, (The blue one) under the heading, Paul, but there are plenty of others too.