 With your father, you were first hands. It's much like what we've been told, like if you're going to go harvest mushrooms, you've got to go with somebody. A book only tells you so much, and if you guess wrong, you're dead. You've got to be physically with somebody. Here's the characteristics of what you're looking for, and here's a false version of it. So it's really fascinating that your father educated all of you, and then you stuck with it through your life.