Another level of experimental blinding would be to avoid conferring with the other observatory (there are two components to LIGO, one in Hanford, WA and one in Livingston, LA) for confirmation&#x2F;correlation until after one site&#x27;s evaluation is complete. I don&#x27;t know whether this is the current practice.<p>In any case, if the observatories are actually able to detect gravitational waves and if there are no theoretical obstacles, eventually two black holes will merge, which will produce a completely fantastic observation consisting of a rapidly rising frequency (as the two BHs circle each other closer and closer, shedding their orbital energy as gravitational waves), followed by a very loud cosmological pop as the BHs finally collapse into each other.