No, there’s an actual paper where that term originated that goes into great deal explaining what it means and what it applies to. It answers those questions and addresses potential objections people might respond with.
There’s no need for–and, frankly, nothing interesting about–“but, what is truth, really?” vibes-based takes on the term.
See also Brigador: apart from the various lasers, exotic ballistics, and nightmarish chemical weapons it includes, there’s also the prosaic “Mãe Dois.” The tech entry leaves no doubt about what it is:
My understanding is that this weapon not only predates the colonies, but space travel entirely. If that is the case then it’s a truly venerable design, and one I’m told will continue to serve for the foreseeable future.