Telling the truth around our house is a big deal, even if it means you will get into trouble. You will usually get into less trouble if you are truthful... Now we have a child who likes to extend the boundaries of the "truth" beyond what is truthful and we've had to talk about such things like, "Is this something you saw with your eyes or saw in your imagination?", "A worm is not a snake", "The hopping of a bunny is not the stomping of a bear".
This afternoon we got to hear about a how he heard a tree 'timbering' in the woods. (This was when he was outside without having permission, again). He regaled us with how he was just standing there and somewhere he heard a crash so of course we should check around the house... which we didn't. When we left the house this evening, we saw a newly fallen tree and our wonderful son proclaimed in a very surprised voice, "OH, I was telling the truth!!!" LOL! I think he was almost as surprised as us that he had indeed told the truth.