It's possible that life exists anywhere in the Solar System where there is any survivable ecological niche, and finding out should be our top priority (since ubiquitous life would have grim implications for the future of humanity). Instead—dad moon programhttps://www.washingtonpost.com/technology/2020/09/14/venus-life-evidence/ …
You can even image them with a little more work. I guess I don't follow how it affects a Great Filter argument
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The Great Filter argument usually involves a claim that it's unlikely we wouldn't see evidence of alien civilizations if they existed. But if we can only see a few hundred habitable exoplanets, that's not so shocking.
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Bostrom argues that if intelligent life develops, it's very likely to expand off the planet it's on (he has some reasoning about self-replicating colonizing probes). If that's true, then we'd expect that we'd see evidence of it, even if life hadn't randomly developed near us.
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Can see some of the images here: https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=directimaging … This is one they found back in 2014. There's basically no detail here we can use to confirm life, much less a civilizationpic.twitter.com/zrgPKuxfWg
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Also, those particular images are of a planet estimated at ~30x the mass of Jupiter, so we're only able to image extremely large exoplanets that are unlikely to have life similar to ours
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