Asking some atheists and agnostics, they always ask for proof. If any kind of non-scientific "proof" is provided to me (miracles, etc), I'd check myself into mental institution as suffering from delusions. After all, supernatural is beyond nature, so one would not expect it to be scientifically provable, but operating on a whim of something beyond nature. Therefore, there is no proof that will make me believe, which sounds just like theists that there is no way for them to not believe despite the evidence. So in effect, I'm just as "blind faith" as theists.
Everything I read so far seem to need proof in scientific sense, which is contrary to the very definition of supernatural. Has this issue been addressed elsewhere? If no evidence can convert, would that person be the same "bull-headedness" as the faithful in philosophical sense? What evidence / proof would you need to believe if you're a non believer?
Thanks for any pointers.