I asked a simple question. If there is no gravity, why do devices exist to measure gravity. Tom, I don't care if they work or not.
They exist. They have been around for decades. Scientists at a university in Scotland are working to make smaller and less expensive versions of them. And you just want to claim they don't work. Or they have never worked. Or oil explorers are crooked. Or someone has a catchy name for crooked oil explorers. All to keep "answering" with posts that obfuscate or change the subject.
If someone believed in gravity, invented the device, then found it didn't work. That would have been the end of it. Yet these devices persist. I'm really done with this subject. I think the lengths you go to in order to avoid just answering the original question are answer enough for me.
You do realize that, objectively, you are the crazy person coming here and claiming the existence of a magic device that can detect bodies far beneath the earth.
I have shown you that this device and its techniques were birthed in fraud, yet you think it is me that needs to show that the device does not work. The articles you have posted say that the gravimeter "could" or "can" detect structures, and none state that it did detect something.
Where is the basic science showing that the device has ever actually successfully detected something below the earth? Generic articles discussing the theory of how it could or can work is not good enough. Asking "why do these devices exist" is not good enough.
We may as well look up "how do dowsing rods work" if that is your qualifier for truth. At least those spook devices have a few success stories claiming to have discovered things, which seems to be more than we can say for these gravimeter devices.
And, apparently, based on the tone of your logic, we just need to ask "why do dowsing rods exist if they don't work," and just like that they are proven to work. Who knew science was so easy?