It is through language that people gain understanding and come to know things, but the fact that something is true, will remain whether we come to know it or not. I don't always whole-heartedly accept Prof. Stufflebeam's opinions as facts, but I think he's right on regarding this one.
Truth is definitely a concept of our making.
If a gorilla feels hungry, she eats. She knows it's true that if she doesn't eat, she will remain hungry. People dwell in a more confusing realm, I think. For instance, let's examine truth in the War of 1812. The diplomatic situation and the physical reality of fighting seem to support this notion.