Calling something the truth does not make it true. Truth refers to those things that are true. Truth stands up to investigations and questions. In fact, truth invites questioning and close examination. Those who walk in truth don't have to "defend" the truth because the truth is self-evident. For example, the truth is that we can safely walk upon the ground. The ground will hold us up. This truth is self evident. You don't have to convince anyone of the this truth. Everyone can see it for themselves.
Truth is simple. It is what it is.