A young boy and his dad went out fishing one fine morning. After a few quiet hours out in the boat, the boy became curious about the world around him. He looked up at his dad and asked "How do fish breath under water?"
His dad thought about it for a moment, then replied, "I really don't know, son."
The boy sat quietly from another moment, then turned back to his dad and asked, "How does our boat float on the water?"
Once again his dad replied, "Don’t know, son."
Pondering his thoughts again, a short while later, the boy asks "Why is the sky blue?"
Again, his dad replied. "Don’t know, son."
The inquisitive boy, worried he was annoying his father, asks this time "Dad, do you mind that I'm asking you all of these questions?"
"Of course not son." replied his dad, "How else are you ever going to learn anything?"