I was unsure, but thought, due to the argument/paradox being based entirely of special relativity, specifically relativity of simultaneity that it would be allowed. And also that I am not asking for opinion on determinism/free, it seems to be determinism to me, but I can't see it ever called...
The thing I was pleased to hear about with Interstellar was an accurate portrayal of a wormhole (a sphere), so why was a hollow half-sphere used instead? Am I missing something?