You mean ". . . based on observable facts and theory" that come from their personal subjective view of the world that we all live in (not everyone sees your facts and theory as "proof"). Science is a wonderful "tool" which can at times lead to marvelous advancements in the human condition. It, however, cannot explain every phenomenon that humans have been witness to. Oh, it tries. But it is woefully inadequate to the complete task. Otherwise, we would not be engaging in these mundane arguments over and over again. But, hey, have a nice day.