Then you haven't been reading too closely. The evidence (observations, experimental results, whatnot) are the facts. For instance, there is a fact of evolution -- that organisms change over generations. Theories explain the facts. There is a Theory of Evolution which explains why organisms change over generations.
It's really not all that hard to grasp.
You are obviously the one who hasn't been paying attention. Did you notice the psychotic responses I got to my simple observation?