When it does not know, then it intuits the answer, and most of the time it comes up with the truth. However, the truth may not always be the answer you are looking for. I think we will not know the entire truth to life because life is not finished yet. Whenever we think we know the truth to anything, all we have to do, is to step back and observe the whole picture, then we realize that we did not really know the whole truth. The truth is, it just is not a finished picture yet.
Life is like making a movie.
You cannot know the entire script until the movie is completed. We cannot know the whole picture because we cannot see the whole picture. If you went to a clairvoyant and asked she or he to see the picture of your whole life. They may be able to see it, but cannot express it, because if you live another forty years, it would take them forty years to tell you all of the details. However, clairvoyants see in symbols, or ideas.