"Green says that the major betters with prediction market experience independently agree that there is no self-consistent scenario where all of Civilization's emergency radios stop working except ours. We weren't told to shut ours off. We are broadcasting. If aliens hunted down every last active transmitter they would have gotten ours. If Negative Utilitarians blew up the Exception Handling transmitters we'd be hearing a lot of non-EH emergency transmitters."
"The emergency radios visibly appear to work with respect to each other. So they were both sabotaged by separately retuning their oscillators to a different, but matched radio range that is not the standard emergency range."