larc,
I believe in Blessed Ink Blots. They are real, and I can prove Ink Blots are real. When I get one on my shirt, I always bless it. Now if I trot out some vague concept (i.e., I believe in God) I can't prove the theory beyond saying, "I believe." The God assumption might be correct, but the burden of proof falls on the believer--which of course can't be done.
I just needed to defend my faith in Blessed Ink Blots, larc. May your ink pen never run dry!