I'm not trolling here. These are honest questions: I assume, since we're spending more money on a more advanced instrument, that we didn't find anything the first time around? Was that because the instrument likely wasn't sensitive enough or because they likely don't exist? If we didn't find them first time around, does that call into question some aspect of GR? I know GR is a theory that has been well proven, but if we don't find them this time around does that have significant implications?