i'm not saying there's no way aliens would ever build such a thing, just that if they did then some aliens would have done some things that we'd notice
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Replying to @VesselOfSpirit
The sail could have been traveling for a long time, and the period during which the aliens have been transmitting might not line up with the period we were listening.
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Replying to @VesselOfSpirit @PomoPsiOp
also i'd expect them to do a lot more things we'd notice, like colonization
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Replying to @VesselOfSpirit @PomoPsiOp
i don't know. maybe you could have a model where having enough intelligence to do colonization makes you realize it's good to drop out of the universe but having enough intelligence to do scouting does not? seems like a stretch
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Replying to @VesselOfSpirit
Enough intelligence to launch a probe is also enough intelligence to experience societal collapse before the probe returns any useful information.
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Replying to @PomoPsiOp
i can see it happen once by coincidence, i can't really see how it always happening could be an equilibrium across billions of years
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Replying to @VesselOfSpirit @PomoPsiOp
i mean either the galaxy has been full of such probes for a long time (even though it doesn't have a single von neumann probe) or we got insanely lucky, right
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Replying to @VesselOfSpirit
The galaxy could be full of one planet graves of civilizations who launched a few probes but didn't have the attention span to colonize other worlds.
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Replying to @PomoPsiOp
aside from whether that's true, that leaves the time dimension. why would we be looking at the right time to see one of these few probes
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(maybe each one visits a long sequence of systems? seems like it would still spend a lot more time in deep space than in star systems)
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