steven comments on Should We Ban Physics? - Less Wrong
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Has anyone done an analysis to rule out existential risks from the possibility of time travel at LHC? Also, what about universe creation (in a way not already occurring in nature), which raises its own ethical issues?
Both of these do seem very improbable; I would bet that they can be ruled out completely through some argument that has not yet been spelled out in a thorough way. They also seem like issues that nonphysicists are liable to spin a lot of nonsense around, but that's not an excuse.