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gptkb:The_Fermi_Paradox
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gptkb:Zoo_hypothesis
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gptkb:The_Fermi_Paradox
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gptkb:Rare_Earth_hypothesis
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gptkb:The_Fermi_Paradox
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Civilizations exist for a short time
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gptkb:The_Fermi_Paradox
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gptkb:Great_Filter
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gptkb:The_Fermi_Paradox
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Lack of technological means to detect signals
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gptkb:The_Fermi_Paradox
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We are alone in the galaxy
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gptkb:The_Fermi_Paradox
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Self-destruction of civilizations
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gptkb:The_Fermi_Paradox
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Non-interference by advanced civilizations
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gptkb:The_Fermi_Paradox
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Civilizations are too far apart
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