There are lots of things that people aren't sure if they know or not, for example no one knows if the sky is really blue, or if the grass is really green. I mean, who every defined a color, actually, who ever thought they were just so special that they could go around giving everything a random name, and who invented a language? The questions of the unknown are just eating us alive at points in our life, and the truth is, there is no answer.
Oh, well. Life sucks, move on.
Peace, my homies.