Tai, I have somewhat of an issue myself with the use of the word "belief". However, as others have noted, I used it in the manner in which it was used in the article, to mean "I accept based on evidence which has been presented but which I haven't actually experimentally verified myself" or something similar to that.
So you accept things based on supposed evidence you haven't seen. You have faith that this evidence you haven't seen is of high quality, apparently enough to accept it.