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The amount of energy used actually makes it less likely to be intelligence.



Initially I thought that as well: "why would intelligent life spew tons of energy into random solid angles?". But there may be a reason to do this. I wouldn't be sure if they would go through the effort to not pollute -- just look at humans. We pollute space with our signals. Civilizations that command astronomical amounts of energy as if they were pennies might just do the same thing.




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