I only learned about the burden of proof from this website, like much of my philosophical knowledge. Usually I only pursue knowledge that has a direct application to things going on in my life i.e. NW guide to mushrooms, theory of games and economic behavior, the Bible, the Necronomicon, the Satanic Bible, or even the Witches Bible. It never occured to me to seek out philosophical knowledge directly I mostly dealt with theology, metaphysics, or practical guides. I've read tons of fiction too.
Rhizo
Rhizo