&gt; But I think the system has only been designed to be reliable as a whole.<p>Yes, absolutely, I only meant that initial evaluations might be more objective if the two observatories cannot compare notes (at first) -- that might lead to a kind of confirmation bias. Only after one observatory satisfies itself that they have a sufficiently unambiguous signal should they be allowed to correlate with the other observatory&#x27;s results.<p>Considering the absence of plausible signals to date, this idea might be bending over backwards to avoid observational bias.