Truth is a concept. I would not be able to talk about truth without first explaining the axioms of reality and concept-formation.
Truth is a quality of propositions. A proposition is true if it accurately corresponds to reality. According to Thomas Aquinas, “A judgment is said to be true when it conforms to the external reality.” This is called the correspondence theory of truth. It is the only valid theory of truth. Another way to state the correspondence theory is found in LDS scriptures. “Truth is knowledge of things as they are, and as they were, and as they are to come.” (D&C 93:24) You cannot have knowledge of things as they aren’t.
Truth does not apply to objects. The question, “Is the Matterhorn true or false?” is a meaningless question. The concept of truth does not apply. To say, “the Matterhorn is true” is to speak nonsense.
Truth only applies to propositions such as judgements. Here is an example of a proposition: “A goat is on Matterhorn?” This proposition makes sense because it can be either true or false, though it cannot be both.
If a proposition can be true or false it has sense. If a proposition cannot be true or false, it is nonsense.
If one wants to judge whether or not a statement is true, one must assume reality and concepts. Then he/she must compare the statement to the way things really are in reality. Without reality as an axiom, the concept of truth is meaningless.
