I see no qualms, as some people do, in finding certitude in the non existence of something. After all, I highly doubt that people are agnostic in relation to every single man-made myth. There comes a particular time, if one is going to be intellectually honest, that he realizes enough time has passed with zero evidence in support of something to conclude that something does not exist.
"Never trust a fox. Looks like a dog, behaves like a cat."
~ Erin Hunter
~ Erin Hunter