The same way you and I learned how to use it, I think. I don't really recall being trained on it. One day my refresh button was gone, and I was just scrolling a

The same way you and I learned how to use it, I think. I don't really recall being trained on it. One day my refresh button was gone, and I was just scrolling and dragging around, and "Oh what's this do?" If this hypothetical person has never used a touch device before, they'll be stuck on the "scrolling and dragging around" step, but it won't be long 'til they stumble upon the pull-down.