I think it’s Google’s responsibility to make it clear, though, either by putting in the theoretical work to apply differential privacy or proposing a refinement

I think it’s Google’s responsibility to make it clear, though, either by putting in the theoretical work to apply differential privacy or proposing a refinement of the concept that allows them to. It’s like those people who propose grand new theories of physics without using any math; if you can’t connect your ideas to what’s come before, people will be rightfully suspicious whether they’re built on quicksand.