I am saying "making a choice" is nothing more and nothing less than "considering two or more possibilities and selecting one of them."
Ah, so you're defining the expression "making a choice" as "considering and selecting". OK.
So from your point of view, you are making a choice
Am I making a choice from an external point of view?
I'm not sure what you mean by "a choice from an external point of view." Other people can see that you considered several possibilities and selected one of them. It may be (if this deterministic theory is true) that someone can figure out in advance which one you are going to select, and perhaps that person wouldn't describe it as a choice. That's just a question of how they are using the word.
You're given the option to torture everyone in the universe, or inflict a dust speck on everyone in the universe. Either you are the only one in the universe, or there are 3^^^3 perfect copies of you (far enough apart that you will never meet.) In the latter case, all copies of you are chosen, and all make the same choice. (Edit: if they choose specks, each person gets one dust speck. This was not meant to be ambiguous.)
As it happens, a perfect and truthful predictor has declared that you will choose torture iff you are alone.
What do you do?
How does your answer change if the predictor made the copies of you conditional on their prediction?
How does your answer change if, in addition to that, you're told you are the original?