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His mammal point is terrible at demonstrating that. It doesnt do anything like that. And no one bases their pro-choice position on the premise that ALL acts of coercion are wrong. Merely the initiation of violent coercion.

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Uh, reading comprehension? Half my point is that nobody holds the completely general principle.

Also his point does demonstrate that the silly general principle is necessary to make the OP's argument valid. It's a criticism that can only be avoided by offering the principle, so it forces OP to either give up the argument or claim that pro-choicers base their view on that principle. Technically it doesn't demonstrate the falsity of the principle, but it forces the arguer to come up with a completely generalizable explicit principle which non-idiots will immediately recognize as false. It leads down the road to disaster.