You seem to have some misunderstandings about truth. Many truths are our understanding of real existence, not existence itself. Obviously, our understanding of complex things may be different, but complex things do exist.
For example, the movement of things exists, but Newton's understanding of this existence is different from Einstein's understanding of the same existence (or the movement of more things).
Please understand the restrictions of Newton's Laws of Motion, many years ago, some people think they are right in every environments. My point here is it is difficult to get the truth for somethings. the title means proving everythings whether they are lies.
What is a lie? what is the truth? It is very difficult to find the truth, and the descriptions of the same thing are different for different persons. So the title and its content is a lie.