Agnostic: a pointless term?

[Thumpalumpacus]

To be fair, things like dragons and unicorns are so clearly defined that a clear repudiation of them is simple. Something like a god, however, which can range from an anthropomorphic superhero to an immaterial presence suffusing the entire material universe, and all points in between -- that's a bit harder to say, "I definitely know that doesn't exist." A bit like nailing the proverbial jell-o to the wall.