Since the truth is always involved in determining the facts of a case, we as lawyers also need to ask a question, what it actually is to consider something true in a specific legal context. Simply, the truth is not legally described as something particular although we naturally want a court to decide on the ground of true facts.
Once we know why the truth comes at the scene, we need to explore what it means- mostly in philosophy, and whether or how a judge could use this knowledge to issue a just decision based on a satisfying theoretical background.