Yeah, that's probably right. I'm not sure what "logically possible" means to philosophers, so I tried to give a reductio ad absurdum of the argument as a whole, which should work for any meaning of "logically possible".
Logically possible just means that "it works in theory" -- that there is no logical contradiction. It is possible to have an idea that is logically possible but not physically possible, e.g., a physicist might come up with a internally consistent theory of a universe that hold that the speed of light in a vacuum is 3mph.
These are in contrast to logically impossible worlds, the classic example being a world that contains both an unstoppable force and an unmovable object; these elements contradict each other, so cannot both occur in the same universe.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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