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A comment on Three Super-Massive Black Holes Merging Together in Our Nearby Universe. Parent comment

Re:Three Super-Massive Black Holes Merging Together in Our N... by snet0 on Sunday August 29, 2021 @12:45PM (#28348249)
It doesn't have to be teleporting. Any superluminal travel can break causality. As I linked elsewhere, Sean Carroll has a solo podcast episode[0] where he talks about a few methods by which time travel could be imagined to be possible, given our understanding of the limitations. As is the case with the drive you mentioned, it's often the case that it's something like "well, if we imagine some special case that we don't think is forbidden, we can do xyz". I imagine at some point a few of these not-technically-forbidden holes will be blocked, but also it's not a certainty that all that is true can be shown to be so.

Your link really doesn't provide any basis for FTL travel.

[0] https://www.preposterousuniverse.com/podcast/2020/11/23/124-...

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Re:Three Super-Massive Black Holes Merging Together in Our N... by UnpossibleJim on Sunday August 29, 2021 @02:29PM (#28349227)
No, I know it doesn't provide any basis for FTL travel. It was more a link for the commentors stating that nothing can travel faster than light. I should have labeled it better =/
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Re:Three Super-Massive Black Holes Merging Together in Our N... by snet0 on Sunday August 29, 2021 @03:09PM (#28349555)
Well, it doesn't really show something travelling faster than light, any more than if you shot a laser at the moon and looked at the speed of the dot on the surface as you moved it through some angle. The dot can move arbitrarily fast, but nothing in the system is actually moving faster than light.
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